Facing the increasing demand for data storage, sharing & multimedia processing, more & more users are looking for a NAS system with good performance & an affordable price tag. The Intel&174; quad-core TS-251+ provides an uncompromising high-performance scalable storage solution for professional users. Powered by the intelligent QTS 4.2 operating system, the TS-251+ performs as an easy-to-use yet powerful NAS for data backup, file synchronization & sharing, remote access & multimedia applications, & is ideal for users to create a secure private cloud to access their data easily.\n Centralize your file storage, sharing & backup with excellent performance\n Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n Play 1080p videos with the bundled remote control & multi-channel audio pass-through via HDMI\n Transcode Full HD videos on-the-fly or offline\n Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n Quickly find specific files by real-time, natural search with Qsirch\n Scale up to 10 drives with QNAP UX-800P expansion enclosure\n \n Quad-core 64-bit Intel&174; Celeron&174; CPU for exceptional performance\n \n The TS-251+ is powered by a 64-bit Intel&174; Celeron&174; quad-core 2.0 G Hz processor & has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) & dual Gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0 G Hz to 2.42 G Hz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.\n \n QTS 4.2
- Simple & efficient\n \n Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother & spectacular. Its modern flat design streamlines loading times, & the intelligent desktop means that you can quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, & open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms & geography to bring optimized cloud experiences to you, & incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, & more.\n \n Run additional operating systems on the TS-251+\n \n The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS & a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, & enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets & import them to the TS-251+ without any complex procedures.\n \n Container Station " LXC & Docker&174; Containers inclusive\n \n QNAP Container Station exclusively integrates LXC & Docker&174; lightweight virtualization technologies, allowing you to operate multiple isolated Linux&174; systems on the TS-251+ as well as download apps from the built-in Docker Hub&174; Registry. It supports container import/export & permission settings, & features an informative dashboard & flexible user interface for you to manage multiple containers. You can experience the amazing Container Station & enjoy the playground of virtual containers with the TS-251+. Container Station also supports Online Document app, which means that you can directly view, edit & store files of various types anytime on your NAS, including Office documents, images & text files.\n \n Use your TS-251+ as a PC with Qv PC Technology\n \n QNAP's exclusive Qv PC Technology consolidates a number of high-end technologies including VM integration, multimedia transcoding, HDMI output, cloud integration & NAS connection technologies, allowing users to operate the TS-251+ as a PC when they plug in a keyboard, mouse & HDMI monitor. With Qv PC Technology, the TS-251+ is transformed into a cost-effective device with PC functionalities for users to directly access stored data, run multiple applications using Windows&174;/ Linux&174;/UNIX&174;/ Android&132;&162; based VMs, surf the web, enjoy Full HD videos with Kodi&132;&162;, monitor surveillance live feeds from IP cameras in real time, & much more.\n \n Enjoy videos on TV via HDMI with bundled remote control\n \n QNAP HD Station integrates the powerful Kodi&132;&162; media player & web browser. With HDMI connectivity, you can connect the TS-251+ to a HDTV to watch your rich multimedia content on the big screen. The splendid user interface & support for 7.1-channel audio passthrough bring smooth playback of 1080p videos. You can even watch You Tube&132;&162; videos, surf the web & manage the TS-251+ using Google Chrome&132;&162; or Mozilla Firefox&174; with multilingual keyboard input. HD Station supports multi-tasking & user authentication so only authorized users can access the stored data via HDMI monitors.\n \n The TS-251+ is packed with the QNAP RM-IR002 remote control for you to conveniently control HD Station via the built-in IR receiver. You can also turn your mobile devices into remote controls by installing the Qremote app. HD Station also supports You Tube Pairing, allowing you to select a You Tube&132;&162; video on your smartphone, tablet or computer & play it on your HDTV via the TS-251+.\n \n Real-time & offline video transcoding\n \n The TS-251+ delivers superior real-time Full HD video transcoding to convert your videos to formats that can be smoothly played on PCs, mobile devices & Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.\n \n With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also means that you can set a dedicated folder for automatic video transcoding.\n \n Enjoy media freely with multi-zone multimedia control\n \n Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage & stream photos, music & videos from the TS-251+ to different rooms from a single device using Bluetooth&174;& USB (Universal Serial Bus) devices connected to the TS-251+ (for music streaming only), HDMI, DLNA&174;, Apple TV&174; & Chromecast&132;&162;. Every room member in different zones can enjoy the convenience & simplicity for media playback & multimedia storage.\n \n Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an i OS&174; device to browse videos/photos & play on the TV via Apple TV&174;, or transform the TS-251+ into a powerful streaming machine with DLNA&174;, Roku&174;, Amazon&174; Fire TV, & Google TV&132;&162; support with the support of Plex Media Server.\n \n Qsirch " A smarter, faster way to search\n \n Quickly & easily find documents, photos, videos, & music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, & Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.\n \n Cross-platform file sharing, centralized data storage\n \n The TS-251+ supports SMB/CIFS, NFS, & AFP protocols for file sharing across Windows&174;, Mac&174; & Linux&174;/UNIX&174;. Data, logs & ISO image of CDs & DVDs can be centrally stored in the TS-251+ & protected by an integrated antivirus solution.\n \n File Station integrated with cloud services\n \n The web-based File Station enables you to easily upload, download, & manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, & smart search for files & folders, the File Station also means that you can easily share files with colleagues & friends via unique URLs, email, & a shared space. What's even better, you can also directly browse & transfer files between the TS-251+ & public cloud services like Google Drive&132;&162;, Dropbox&174;, Microsoft&174; One Drive, Box&174;, Yandex&174; Disk & Amazon&174; Cloud Drive through File Station, & view files with Office Online & Google Docs&132;&162; or directly open them with a Google Chrome&132;&162; office extension.\n \n Well-rounded backup solutions to secure data\n \n QNAP Net Bak Replicator supports real-time & scheduled data backup on Windows including Outlook email archiving. Apple Time Machine&174; is also supported to provide Mac&174; OS X users with a solution to effortlessly back up data to the TS-251+. The front panel USB (Universal Serial Bus) 3.0 port on the TS-251+ features a one-touch-copy function for you to instantly back up data on external drives to the TS-251+ with just one click, or alternatively to back up data from the TS-251+ to external drives. A wide range of third-party backup software such as Acronis&174; True Image & Symantec&174; Backup Exec are also supported.\n \n Disaster recovery solutions bring peace of mind\n \n The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time & scheduled data backup to remote QNAP NAS or FTP servers & synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained & for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to & restored from a range of cloud storage services, including Amazon&174; S3, Amazon&174; Glacier, Microsoft&174; Azure&132;&162;, Elephant Drive&174;, Dropbox&174;, Google Drive&132;&162;, Google Cloud Storage&132;&162;, & more.\n \n Volume & LUN snapshot simplifies restoration\n \n Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage.QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up & restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots per volume or LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, & quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.\n \n Comprehensive security options\n \n In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, & more. Administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorized access & breach even if the hard drives or the entire system were stolen.\n \n Secure access with VPN Server & VPN Client\n \n The TS-251+ can be a VPN server with L2TP/IPsec, Open VPN, & PPTP support, allowing you to securely access data shared within the private local network. The TS-251+ also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n \n File synchronization across devices & clouds\n \n Qsync utility turns your TS-251+ into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files & always have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization & group file sharing, greatly enhancing the flexibility of team projects & collaboration. It also supports centralized configuration, & means that you can remotely erase the Qsync folder on a lost device to avoid data breaches, & even restore it after you have retrieved the device. You can also install the Cloud Drive Sync app from QTS App Center to easily sync files with Google Drive&132;&162; & Dropbox&174; cloud storage.\n \n Comprehensive surveillance solution providing 24/7 security\n \n The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3, 000 compatible IP camera models, & expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording & playback with a wide range of customizable settings. You can also install the Vmobile app on your i OS&174; or Android&132;&162; devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels & you can expand up to 40 channels by purchasing additional licenses.\n \n Access & enjoy with your mobile devices\n \n The TS-251+ is your private cloud storage that virtually enlarges the capacity of your smart mobile devices. Qfile means that you can access, upload, download, manage, & share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an i OS&174; device, users can also browse videos & photos stored on the TS-251+ & play on a TV via Apple&174; TV. Qmanager lets you monitor & manage the TS-251+ remotely & efficiently without turning on your PC. You can take & share digital notes with Qnotes, & enjoy & share music, photos & videos on the TS-251+ anywhere & anytime with Qmusic, Qphoto & Qvideo apps.\n \n Install-on-demand apps to extend NAS functionality\n \n The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP & third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, & much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.\n \n Expand storage capacity easily\n \n The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on dem&, making the TS-251+ an ideal file center with large storage capacity for storage-intensive business applications.\n \n With the support of QJBOD Express (JBOD enclosures roaming), you can just connect a large capacity QNAP expansion enclosure to the TS-251+, & migrate data to another NAS through the JBOD enclosure without network connectivity.\n \n Energy-saving & eco-friendly\n \n The TS-251+ utilizes a 22nm CPU & DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, & Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.\n \n Easy-to-use NAS management tools\n The TS-251+ provides comprehensive system tools to increase management efficiency.\n
- Administrators can turn on the Turbo NAS via LAN to save energy & improve security.\n
- The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet & saves the data, enabling centralized log management with greater efficiency.\n \n Additional features\n The TS-251+ supports various applications for home offices as an all-in-one Turbo NAS with cost-efficiency.\n \n
- The Turbo NAS supports RADIUS server which provides centralized authorization management for computers to connect & use a network service.\n
- QTS also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n \n
- Centralize your file storage, sharing & backup with excellent performance\n
- Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n
- Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n
- Enjoy the best audio-visual experience with HDMI output & the free remote control\n
- Transcode Full HD videos on-the-fly or offline*\n
- Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n
- Quickly find specific files by real-time, natural search with Qsirch\n
- Scale up to 10 drives with QNAP UX-800P expansion enclosure\n\n class="generic"> Storage Total installed storage capacity 28 TBStorage drives installed Yes Installed storage drive type HDDNumber of storage drives installed 2 Supported storage drive types HDD, SSDNumber of storage drives supported 2 Storage drive interface Serial ATA IIIStorage drive capacity 14000 GBHot-swap drive bays Yes RAID support Yes Supported file systems FAT32, HFS+, NTFS, ext 3, ext 4RAID levels 0, 1, JBODSupported storage drive interfaces Serial ATA, Serial ATA II, Serial ATA IIIStorage drive sizes supported 2.5, 3.5 Processor Processor boost frequency 2.42 GHz Processor frequency 2 GHz Processor family Intel&174; Celeron&174; Processor cores 4 Memory Internal memory type DDR3 L Internal memory 2 GBMaximum RAM supported 8 GBMemory slots 2 Flash memory 512 MBNetworking Dynamic DNS (DDNS) Yes Ethernet LANYes Ethernet LAN data rates 10, 100, 1000 Mbit/s Wi-Fi No Wake-on-LAN ready Yes Supported network protocols CIFS/SMB, AFP (v 3.3), NFS (v 3), FTP, FTPS, SFTP, TFTP, HTTP (S), Telnet, SSH, i SCSI, SNMP, SMTP, SMSCJumbo frames support Yesi SCSI support Yes DHCP server Yes DHCP client Yes WLAN adapter supported Yes Ports & interfaces USB port Yes USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity 2USB 2.0 ports quantity 2HDMI ports quantity 1 Ethernet LAN (RJ-45) ports 2 Hard drive RAID support Yes Supported file systems FAT32, HFS+, NTFS, ext 3, ext 4RAID levels 0, 1, JBODDesign Cooling type Active Fan diameter 7 cm Cable lock slot type Kensington Product colour Black Number of fans 1 fan (s)LED indicators Yes Chassis type Desktop Cable lock slot Yes Technical details Type NASDevice class Home & Home Office Backup function Yes Backup features Cloud, i SCSI LUNProduct colour Black Multilingual support Yes LED indicators Yes Chassis type Desktop Buzzer Yes Number of fans 1 fan (s) Performance Built-in i Tunes server Yes Built-in FTP server Yes System log Yes Share folder CIFS/SMBS.M.A.R.T. support Yes Hot spare Yes Browser supported Chrome, Firefox, Internet Explorer 10+, Safari 7+ Type NASDevice class Home & Home Office Backup function Yes Backup features Cloud, i SCSI LUNOn/off switch Yes Windows operating systems supported Windows 10, Windows 7, Windows 8, Windows 8.1 Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Mac operating systems supported Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.13 High Sierra, Mac OS X 10.14 Mojave Linux operating systems supported Yes Web-based management Yes Security algorithms 256-bit AES, FIPS 140-2, HTTPS, SSH, SSL/TLSReset button Yes Operating system version 4.2 Operating system installed QNAP Turbo System Multilingual support Yes Buzzer Yes Access Control List (ACL) Yes Cooling Cooling type Active Fan diameter 7 cm Fan voltage 12 VNumber of fans 1 fan (s) Security Cable lock slot type Kensington Security algorithms 256-bit AES, FIPS 140-2, HTTPS, SSH, SSL/TLSCable lock slot Yes Access Control List (ACL) Yes Software Windows operating systems supported Windows 10, Windows 7, Windows 8, Windows 8.1 Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Mac operating systems supported Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.13 High Sierra, Mac OS X 10.14 Mojave Linux operating systems supported Yes Operating system version 4.2 Operating system installed QNAP Turbo System Management features On/off switch Yes Web-based management Yes Reset button Yes Power Power supply location External Power supply unit (PSU) capacity 60 WFan voltage 12 VAC input voltage 100-240 VNumber of power supply units 1 External power adapter Yes Weight & dimensions Width 102 mm Depth 225 mm Height 168.5 mm Packaging content Quick installation guide Yes External power adapter Yes Cables included AC, LAN (RJ-45) System requirements Windows operating systems supported Windows 10, Windows 7, Windows 8, Windows 8.1 Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Mac operating systems supported Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.13 High Sierra, Mac OS X 10.14 Mojave Linux operating systems supported Yes Operational conditions Operating temperature (T-T)0
- 40 &176;COperating relative humidity (H-H)5
- 95% Certificates Digital Living Network Alliance (DLNA) certified Yes Packaging data Cables included AC, LAN (RJ-45)"\n\n\n\nhttp://objects.icecat.biz/objects/mmo_62321080_1541170234_8134_23350.pdf














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Facing the increasing demand for data storage, sharing & multimedia processing, more & more users are looking for a NAS system with good performance & an affordable price tag. The Intel&174; quad-core TS-251+ provides an uncompromising high-performance scalable storage solution for professional users. Powered by the intelligent QTS 4.2 operating system, the TS-251+ performs as an easy-to-use yet powerful NAS for data backup, file synchronization & sharing, remote access & multimedia applications, & is ideal for users to create a secure private cloud to access their data easily.\n\n- Centralize your file storage, sharing & backup with excellent performance\n- Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n- Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n- Enjoy the best audio-visual experience with HDMI output & the free remote control\n- Transcode Full HD videos on-the-fly or offline\n- Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n- Quickly find specific files by real-time, natural search with Qsirch\n- Scale up to 10 drives with QNAP UX-800P expansion enclosure\n\n Quad-core 64-bit Intel&174; Celeron&174; CPU for exceptional performance\n The TS-251+ is powered by a 64-bit Intel&174; Celeron&174; quad-core 2.0 G Hz processor & has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) & dual Gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0 G Hz to 2.42 G Hz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.\n\n QTS 4.2
- Simple & efficient\n Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother & spectacular. Its modern flat design streamlines loading times, & the intelligent desktop means that you can quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, & open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms & geography to bring optimized cloud experiences to you, & incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, & more.\n\n Run additional operating systems on the TS-251+\n The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS & a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, & enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets & import them to the TS-251+ without any complex procedures.\n\n Container Station " LXC & Docker&174; Containers inclusive\n QNAP Container Station exclusively integrates LXC & Docker&174; lightweight virtualization technologies, allowing you to operate multiple isolated Linux&174; systems on the TS-251+ as well as download apps from the built-in Docker Hub&174; Registry. It supports container import/export & permission settings, & features an informative dashboard & flexible user interface for you to manage multiple containers. You can experience the amazing Container Station & enjoy the playground of virtual containers with the TS-251+. Container Station also supports Online Document app, which means that you can directly view, edit & store files of various types anytime on your NAS, including Office documents, images & text files.\n\n Real-time & offline video transcoding\n The TS-251+ delivers superior real-time video transcoding (up to 4K H.264) to convert your videos to formats that can be smoothly played on PCs, mobile devices & Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.\n\n With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also means that you can set a dedicated folder for automatic video transcoding.\n\n Enjoy media freely with multi-zone multimedia control\n Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage & stream photos, music & videos from the TS-251+ to different rooms from a single device using Bluetooth&174;& USB (Universal Serial Bus) devices connected to the TS-251+ (for music streaming only), HDMI, DLNA&174;, Apple TV&174; & Chromecast&132;&162;*. Every room member in different zones can enjoy the convenience & simplicity for media playback & multimedia storage.\n\n Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an i OS&174; device to browse videos/photos & play on the TV via Apple TV&174;, or transform the TS-251+ into a powerful streaming machine with DLNA&174;, Roku&174;, Amazon&174; Fire TV, & Google TV&132;&162; support with the support of Plex Media Server.\n\n Qsirch " A smarter, faster way to search\n Quickly & easily find documents, photos, videos, & music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, & Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.\n\n Cross-platform file sharing, centralized data storage\n The TS-251+ supports SMB/CIFS, NFS, & AFP protocols for file sharing across Windows&174;, Mac&174; & Linux&174;/UNIX&174;. Data, logs & ISO image of CDs & DVDs can be centrally stored in the TS-251+ & protected by an integrated antivirus solution.\n\n File Station integrated with cloud services\n The web-based File Station enables you to easily upload, download, & manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, & smart search for files & folders, the File Station also means that you can easily share files with colleagues & friends via unique URLs, email, & a shared space. What's even better, you can also directly browse & transfer files between the TS-251+ & public cloud services like Google Drive&132;&162;, Dropbox&174;, Microsoft&174; One Drive, Box&174;, Yandex&174; Disk & Amazon&174; Cloud Drive through File Station, & view files with Office Online & Google Docs&132;&162; or directly open them with a Google Chrome&132;&162; office extension.\n\n Well-rounded backup solutions to secure data\n QNAP Net Bak Replicator supports real-time & scheduled data backup on Windows including Outlook email archiving. Apple Time Machine&174; is also supported to provide Mac&174; OS X users with a solution to effortlessly back up data to the TS-251+. The front panel USB (Universal Serial Bus) 3.0 port on the TS-251+ features a one-touch-copy function for you to instantly back up data on external drives to the TS-251+ with just one click, or alternatively to back up data from the TS-251+ to external drives. A wide range of third-party backup software such as Acronis&174; True Image & Symantec&174; Backup Exec are also supported.\n\n Disaster recovery solutions bring peace of mind\n The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time & scheduled data backup to remote QNAP NAS or FTP servers & synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained & for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to & restored from a range of cloud storage services, including Amazon&174; S3, Amazon&174; Glacier, Microsoft&174; Azure&132;&162;, Elephant Drive&174;, Dropbox&174;, Google Drive&132;&162;, Google Cloud Storage&132;&162;, & more.\n\n Volume & LUN snapshot simplifies restoration\n Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage.QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up & restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots per volume or LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, & quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.\n\n Comprehensive security options\n In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, & more. Administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorized access & breach even if the hard drives or the entire system were stolen.\n\n Secure access with VPN Server & VPN Client\n The TS-251+ can be a VPN server with L2TP/IPsec, Open VPN, & PPTP support, allowing you to securely access data shared within the private local network. The TS-251+ also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n\n File synchronization across devices & clouds\n Qsync utility turns your TS-251+ into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files & always have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization & group file sharing, greatly enhancing the flexibility of team projects & collaboration. It also supports centralized configuration, & means that you can remotely erase the Qsync folder on a lost device to avoid data breaches, & even restore it after you have retrieved the device. You can also install the Cloud Drive Sync app from QTS App Center to easily sync files with Google Drive&132;&162; & Dropbox&174; cloud storage.\n\n Comprehensive surveillance solution providing 24/7 security\n The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3, 000 compatible IP camera models, & expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording & playback with a wide range of customizable settings. You can also install the Vmobile app on your i OS&174; or Android&132;&162; devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels & you can expand up to 40 channels by purchasing additional licenses.\n\n Access & enjoy with your mobile devices\n The TS-251+ is your private cloud storage that virtually enlarges the capacity of your smart mobile devices. Qfile means that you can access, upload, download, manage, & share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an i OS&174; device, users can also browse videos & photos stored on the TS-251+ & play on a TV via Apple&174; TV. Qmanager lets you monitor & manage the TS-251+ remotely & efficiently without turning on your PC. You can take & share digital notes with Qnotes, & enjoy & share music, photos & videos on the TS-251+ anywhere & anytime with Qmusic, Qphoto & Qvideo apps.\n\n Install-on-demand apps to extend NAS functionality\n The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP & third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, & much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.\n\n LED indicators with adjustable brightness controls\n With adjustable 3-stage brightness controls for LED indicators, the TS-251+ provides flexible LED brightness options. Based on the surrounding environment, you can adjust the brightness of all system indicators & also schedule the system to automatically dim the LEDs at certain times when needed.\n\n Expand storage capacity easily\n The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on dem&, making the TS-251+ an ideal file center with large storage capacity for storage-intensive business applications.\n\n With the support of QJBOD Express (JBOD enclosures roaming), you can just connect a large capacity QNAP expansion enclosure to the TS-251+, & migrate data to another NAS through the JBOD enclosure without network connectivity.\n\n Energy-saving & eco-friendly\n The TS-251+ utilizes a 22nm CPU & DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, & Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.\n\n Easy-to-use NAS management tools\n\n The TS-251+ provides comprehensive system tools to increase management efficiency.\n\n Administrators can turn on the Turbo NAS via LAN to save energy & improve security.\n\n\n The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet & saves the data, enabling centralized log management with greater efficiency. Feature Feature Value Total installed storage capacity 2 TBStorage drives installed Y Installed storage drive type HDDSupported storage drive types HDD, SSDNumber of storage drives supported 2RAID support Y Hot-swap drive bays Y Supported storage drive interfaces Serial ATA II, Serial ATA IIIStorage drive sizes supported 2.5, 3.5"RAID levels 0, 1, JBODOnline RAID migration Y Online RAID expansion Y Supported file systems FAT32, HFS+, NTFS, ex FAT, ext 3, ext 4 Bad block scan Y Processor frequency 2 GHz Processor family Intel&174; Celeron&174; Processor cores 4 Internal memory 2 GBInternal memory type DDR3 L Memory clock speed 1600 MHz Maximum RAM supported 8 GBMemory slots 2x SODIMMFlash memory 512 MBEthernet LANYWi-Fi N Ethernet LAN data rates 10, 100, 1000 Mbit/s DHCP client YDHCP server Y Jumbo frames support Yi SCSI support Y Wake-on-LAN ready Y Supported network protocols CIFS/SMB, AFP v 3.3, NFS v 3, FTP, FTPS, SFTP, TFTP, HTTP (S), Telnet, SSH, i SCSI, SNMP, SMTP, SMSCLink aggregation Y Dynamic DNS (DDNS)YEthernet LAN (RJ-45) ports 2USB port YUSB 2.0 ports quantity 2USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity 2HDMI ports quantity 1 Chassis type Tower Cooling type Active Product colour Black Number of fans 1 fan (s) Fan diameter 7 cm LED indicators HDD, LAN, Power, Status, USBCable lock slot Y Cable lock slot type Kensington Type NASDevice class Home & Home Office Backup function Y Backup features Cloud, USB drive, i SCSI LUNBuzzer Y Noise level 15.4 d B Snapshot Y Management protocols SNMPSecurity algorithms 256-bit AES, FIPS 140-2, HTTPS, SSHWeb-based management Y Reset button Y On/off switch Y Built-in i Tunes server Y Built-in FTP server Y Browser supported Apple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox System log YS.M.A.R.T. support Y Share folder 512 Share folder access right management Y Remotely operated Y Backup button Y Universal Plug & Play (UPn P)YOperating system installed QNAP Turbo System Operating system version 4.3 Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Linux operating systems supported Y Mac compatibility Y Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Power supply location External Power supply unit (PSU) capacity 60 WPower consumption (typical)18.09 WPower consumption (sleep)0.57 WPower consumption (HDD standby)10.56 WAC input voltage 100
- 240 VFan voltage 12 VWidth 102 mm Depth 219 mm Height 169 mm Weight 1.28kg Package weight 2.32kg External power adapter Y Cables included AC, LAN (RJ-45) Quick installation guide Y Number of screws 14 Handheld remote control Y Operating temperature (T-T)0
- 40 &176;COperating relative humidity (H-H)5
- 95% Number of simultaneous users 4096 user (s)



...

Facing the increasing demand for data storage, sharing & multimedia processing, more & more users are looking for a NAS system with good performance & an affordable price tag. The Intel&174; quad-core TS-251+ provides an uncompromising high-performance scalable storage solution for professional users. Powered by the intelligent QTS 4.2 operating system, the TS-251+ performs as an easy-to-use yet powerful NAS for data backup, file synchronization & sharing, remote access & multimedia applications, & is ideal for users to create a secure private cloud to access their data easily.\n \n
- Centralize your file storage, sharing & backup with excellent performance\n
- Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n
- Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n
- Enjoy the best audio-visual experience with HDMI output & the free remote control\n
- Transcode Full HD videos on-the-fly or offline\n
- Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n
- Quickly find specific files by real-time, natural search with Qsirch\n
- Scale up to 10 drives with QNAP UX-800P expansion enclosure\n \n Quad-core 64-bit Intel&174; Celeron&174; CPU for exceptional performance\n The TS-251+ is powered by a 64-bit Intel&174; Celeron&174; quad-core 2.0 G Hz processor & has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) & dual Gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0 G Hz to 2.42 G Hz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.\n \n QTS 4.2
- Simple & efficient\n Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother & spectacular. Its modern flat design streamlines loading times, & the intelligent desktop means that you can quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, & open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms & geography to bring optimized cloud experiences to you, & incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, & more.\n \n Run additional operating systems on the TS-251+\n The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS & a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, & enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets & import them to the TS-251+ without any complex procedures.\n \n Container Station " LXC & Docker&174; Containers inclusive\n QNAP Container Station exclusively integrates LXC & Docker&174; lightweight virtualization technologies, allowing you to operate multiple isolated Linux&174; systems on the TS-251+ as well as download apps from the built-in Docker Hub&174; Registry. It supports container import/export & permission settings, & features an informative dashboard & flexible user interface for you to manage multiple containers. You can experience the amazing Container Station & enjoy the playground of virtual containers with the TS-251+. Container Station also supports Online Document app, which means that you can directly view, edit & store files of various types anytime on your NAS, including Office documents, images & text files.\n \n Real-time & offline video transcoding\n The TS-251+ delivers superior real-time video transcoding (up to 4K H.264) to convert your videos to formats that can be smoothly played on PCs, mobile devices & Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.\n \n With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also means that you can set a dedicated folder for automatic video transcoding.\n \n Enjoy media freely with multi-zone multimedia control\n Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage & stream photos, music & videos from the TS-251+ to different rooms from a single device using Bluetooth&174;& USB (Universal Serial Bus) devices connected to the TS-251+ (for music streaming only), HDMI, DLNA&174;, Apple TV&174; & Chromecast&132;&162;*. Every room member in different zones can enjoy the convenience & simplicity for media playback & multimedia storage.\n \n Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an i OS&174; device to browse videos/photos & play on the TV via Apple TV&174;, or transform the TS-251+ into a powerful streaming machine with DLNA&174;, Roku&174;, Amazon&174; Fire TV, & Google TV&132;&162; support with the support of Plex Media Server.\n \n Qsirch " A smarter, faster way to search\n Quickly & easily find documents, photos, videos, & music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, & Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.\n \n Cross-platform file sharing, centralized data storage\n The TS-251+ supports SMB/CIFS, NFS, & AFP protocols for file sharing across Windows&174;, Mac&174; & Linux&174;/UNIX&174;. Data, logs & ISO image of CDs & DVDs can be centrally stored in the TS-251+ & protected by an integrated antivirus solution.\n \n File Station integrated with cloud services\n The web-based File Station enables you to easily upload, download, & manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, & smart search for files & folders, the File Station also means that you can easily share files with colleagues & friends via unique URLs, email, & a shared space. What's even better, you can also directly browse & transfer files between the TS-251+ & public cloud services like Google Drive&132;&162;, Dropbox&174;, Microsoft&174; One Drive, Box&174;, Yandex&174; Disk & Amazon&174; Cloud Drive through File Station, & view files with Office Online & Google Docs&132;&162; or directly open them with a Google Chrome&132;&162; office extension.\n \n Well-rounded backup solutions to secure data\n QNAP Net Bak Replicator supports real-time & scheduled data backup on Windows including Outlook email archiving. Apple Time Machine&174; is also supported to provide Mac&174; OS X users with a solution to effortlessly back up data to the TS-251+. The front panel USB (Universal Serial Bus) 3.0 port on the TS-251+ features a one-touch-copy function for you to instantly back up data on external drives to the TS-251+ with just one click, or alternatively to back up data from the TS-251+ to external drives. A wide range of third-party backup software such as Acronis&174; True Image & Symantec&174; Backup Exec are also supported.\n \n Disaster recovery solutions bring peace of mind\n The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time & scheduled data backup to remote QNAP NAS or FTP servers & synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained & for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to & restored from a range of cloud storage services, including Amazon&174; S3, Amazon&174; Glacier, Microsoft&174; Azure&132;&162;, Elephant Drive&174;, Dropbox&174;, Google Drive&132;&162;, Google Cloud Storage&132;&162;, & more.\n \n Volume & LUN snapshot simplifies restoration\n Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage.QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up & restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots per volume or LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, & quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.\n \n Comprehensive security options\n In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, & more. Administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorized access & breach even if the hard drives or the entire system were stolen.\n \n Secure access with VPN Server & VPN Client\n The TS-251+ can be a VPN server with L2TP/IPsec, Open VPN, & PPTP support, allowing you to securely access data shared within the private local network. The TS-251+ also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n \n File synchronization across devices & clouds\n Qsync utility turns your TS-251+ into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files & always have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization & group file sharing, greatly enhancing the flexibility of team projects & collaboration. It also supports centralized configuration, & means that you can remotely erase the Qsync folder on a lost device to avoid data breaches, & even restore it after you have retrieved the device. You can also install the Cloud Drive Sync app from QTS App Center to easily sync files with Google Drive&132;&162; & Dropbox&174; cloud storage.\n \n Comprehensive surveillance solution providing 24/7 security\n The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3, 000 compatible IP camera models, & expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording & playback with a wide range of customizable settings. You can also install the Vmobile app on your i OS&174; or Android&132;&162; devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels & you can expand up to 40 channels by purchasing additional licenses.\n \n Access & enjoy with your mobile devices\n The TS-251+ is your private cloud storage that virtually enlarges the capacity of your smart mobile devices. Qfile means that you can access, upload, download, manage, & share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an i OS&174; device, users can also browse videos & photos stored on the TS-251+ & play on a TV via Apple&174; TV. Qmanager lets you monitor & manage the TS-251+ remotely & efficiently without turning on your PC. You can take & share digital notes with Qnotes, & enjoy & share music, photos & videos on the TS-251+ anywhere & anytime with Qmusic, Qphoto & Qvideo apps.\n \n Install-on-demand apps to extend NAS functionality\n The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP & third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, & much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.\n \n LED indicators with adjustable brightness controls\n With adjustable 3-stage brightness controls for LED indicators, the TS-251+ provides flexible LED brightness options. Based on the surrounding environment, you can adjust the brightness of all system indicators & also schedule the system to automatically dim the LEDs at certain times when needed.\n \n Expand storage capacity easily\n The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on dem&, making the TS-251+ an ideal file center with large storage capacity for storage-intensive business applications.\n \n With the support of QJBOD Express (JBOD enclosures roaming), you can just connect a large capacity QNAP expansion enclosure to the TS-251+, & migrate data to another NAS through the JBOD enclosure without network connectivity.\n \n Energy-saving & eco-friendly\n The TS-251+ utilizes a 22nm CPU & DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, & Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.\n \n Easy-to-use NAS management tools\n \n The TS-251+ provides comprehensive system tools to increase management efficiency.\n \n Administrators can turn on the Turbo NAS via LAN to save energy & improve security.\n \n \n The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet & saves the data, enabling centralized log management with greater efficiency.\n\n Storage Total installed storage capacity 20 TBOnline RAID migration Yes Online RAID expansion Yes Bad block scan Yes Storage drives installed Yes Installed storage drive type HDDSupported storage drive types HDD, SSDNumber of storage drives supported 2 Hot-swap drive bays Yes RAID support Yes Supported file systems FAT32, HFS+, NTFS, ex FAT, ext 3, ext 4RAID levels 0, 1, JBODSupported storage drive interfaces Serial ATA II, Serial ATA IIIStorage drive sizes supported 2.5, 3.5" Processor Processor frequency 2 GHz Processor family Intel&174; Celeron&174; Processor cores 4 Memory Internal memory type DDR3 L Internal memory 2 GBMemory clock speed 1600 MHz Maximum RAM supported 8 GBMemory slots 2x SODIMMFlash memory 512 MBNetworking Link aggregation Yes Dynamic DNS (DDNS) Yes Ethernet LANYes Ethernet LAN data rates 10, 100, 1000 Mbit/s Wi-Fi No Wake-on-LAN ready Yes Supported network protocols CIFS/SMB, AFP v 3.3, NFS v 3, FTP, FTPS, SFTP, TFTP, HTTP (S), Telnet, SSH, i SCSI, SNMP, SMTP, SMSCJumbo frames support Yesi SCSI support Yes DHCP server Yes DHCP client Yes Ports & interfaces USB port Yes USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity 2USB 2.0 ports quantity 2HDMI ports quantity 1 Ethernet LAN (RJ-45) ports 2 Hard drive RAID support Yes Supported file systems FAT32, HFS+, NTFS, ex FAT, ext 3, ext 4RAID levels 0, 1, JBODDesign Cooling type Active Fan diameter 7 cm Cable lock slot type Kensington Product colour Black Number of fans 1 fan (s)LED indicators HDD, LAN, Power, Status, USBChassis type Tower Cable lock slot Yes Technical details Type NASDevice class Home & Home Office Backup function Yes Backup features Cloud, USB drive, i SCSI LUNProduct colour Black Noise level 15.4 d BLED indicators HDD, LAN, Power, Status, USBChassis type Tower Buzzer Yes Number of simultaneous users 4096 user (s) Number of fans 1 fan (s) Performance Built-in i Tunes server Yes Built-in FTP server Yes System log Yes Share folder access right management Yes Share folder 512S.M.A.R.T. support Yes Browser supported Apple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox Mac compatibility Yes Remotely operated Yes Backup button Yes Universal Plug & Play (UPn P) Yes Type NASDevice class Home & Home Office Backup function Yes Backup features Cloud, USB drive, i SCSI LUNOn/off switch Yes Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Linux operating systems supported Yes Web-based management Yes Security algorithms 256-bit AES, FIPS 140-2, HTTPS, SSHReset button Yes Operating system version 4.3 Operating system installed QNAP Turbo System Noise level 15.4 d B Management protocols SNMPBuzzer Yes Snapshot Yes Cooling Cooling type Active Fan diameter 7 cm Fan voltage 12 VNumber of fans 1 fan (s) Security Cable lock slot type Kensington Security algorithms 256-bit AES, FIPS 140-2, HTTPS, SSHCable lock slot Yes Software Mac compatibility Yes Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Linux operating systems supported Yes Operating system version 4.3 Operating system installed QNAP Turbo System Management features On/off switch Yes Web-based management Yes Reset button Yes Management protocols SNMPPower Power consumption (HDD standby)10.56 WPower supply location External Power supply unit (PSU) capacity 60 WFan voltage 12 VAC input voltage 100
- 240 VPower consumption (typical)18.09 WPower consumption (sleep)0.57 WExternal power adapter Yes Weight & dimensions Width 102 mm Depth 219 mm Height 169 mm Weight 1.28kg Package weight 2.32kg Packaging content Number of screws 14 Handheld remote control Yes Quick installation guide Yes External power adapter Yes Cables included AC, LAN (RJ-45) System requirements Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Linux operating systems supported Yes Operational conditions Operating temperature (T-T)0
- 40 &176;COperating relative humidity (H-H)5
- 95% Packaging data Package weight 2.32kg Cables included AC, LAN (RJ-45) Other features Number of simultaneous users 4096 user (s)\n\n\n\nhttp://objects.icecat.biz/objects/mmo_38324872_1528663688_956_22088.pdf











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Facing the increasing demand for data storage, sharing & multimedia processing, more & more users are looking for a NAS system with good performance & an affordable price tag. The Intel&174; quad-core TS-251+ provides an uncompromising high-performance scalable storage solution for professional users. Powered by the intelligent QTS 4.2 operating system, the TS-251+ performs as an easy-to-use yet powerful NAS for data backup, file synchronization & sharing, remote access & multimedia applications, & is ideal for users to create a secure private cloud to access their data easily.\n\n- Centralize your file storage, sharing & backup with excellent performance\n- Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n- Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n- Enjoy the best audio-visual experience with HDMI output & the free remote control\n- Transcode Full HD videos on-the-fly or offline\n- Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n- Quickly find specific files by real-time, natural search with Qsirch\n- Scale up to 10 drives with QNAP UX-800P expansion enclosure\n\n Quad-core 64-bit Intel&174; Celeron&174; CPU for exceptional performance\n The TS-251+ is powered by a 64-bit Intel&174; Celeron&174; quad-core 2.0 G Hz processor & has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) & dual Gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0 G Hz to 2.42 G Hz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.\n\n QTS 4.2
- Simple & efficient\n Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother & spectacular. Its modern flat design streamlines loading times, & the intelligent desktop means that you can quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, & open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms & geography to bring optimized cloud experiences to you, & incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, & more.\n\n Run additional operating systems on the TS-251+\n The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS & a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, & enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets & import them to the TS-251+ without any complex procedures.\n\n Container Station " LXC & Docker&174; Containers inclusive\n QNAP Container Station exclusively integrates LXC & Docker&174; lightweight virtualization technologies, allowing you to operate multiple isolated Linux&174; systems on the TS-251+ as well as download apps from the built-in Docker Hub&174; Registry. It supports container import/export & permission settings, & features an informative dashboard & flexible user interface for you to manage multiple containers. You can experience the amazing Container Station & enjoy the playground of virtual containers with the TS-251+. Container Station also supports Online Document app, which means that you can directly view, edit & store files of various types anytime on your NAS, including Office documents, images & text files.\n\n Real-time & offline video transcoding\n The TS-251+ delivers superior real-time video transcoding (up to 4K H.264) to convert your videos to formats that can be smoothly played on PCs, mobile devices & Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.\n\n With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also means that you can set a dedicated folder for automatic video transcoding.\n\n Enjoy media freely with multi-zone multimedia control\n Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage & stream photos, music & videos from the TS-251+ to different rooms from a single device using Bluetooth&174;& USB (Universal Serial Bus) devices connected to the TS-251+ (for music streaming only), HDMI, DLNA&174;, Apple TV&174; & Chromecast&132;&162;*. Every room member in different zones can enjoy the convenience & simplicity for media playback & multimedia storage.\n\n Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an i OS&174; device to browse videos/photos & play on the TV via Apple TV&174;, or transform the TS-251+ into a powerful streaming machine with DLNA&174;, Roku&174;, Amazon&174; Fire TV, & Google TV&132;&162; support with the support of Plex Media Server.\n\n Qsirch " A smarter, faster way to search\n Quickly & easily find documents, photos, videos, & music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, & Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.\n\n Cross-platform file sharing, centralized data storage\n The TS-251+ supports SMB/CIFS, NFS, & AFP protocols for file sharing across Windows&174;, Mac&174; & Linux&174;/UNIX&174;. Data, logs & ISO image of CDs & DVDs can be centrally stored in the TS-251+ & protected by an integrated antivirus solution.\n\n File Station integrated with cloud services\n The web-based File Station enables you to easily upload, download, & manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, & smart search for files & folders, the File Station also means that you can easily share files with colleagues & friends via unique URLs, email, & a shared space. What's even better, you can also directly browse & transfer files between the TS-251+ & public cloud services like Google Drive&132;&162;, Dropbox&174;, Microsoft&174; One Drive, Box&174;, Yandex&174; Disk & Amazon&174; Cloud Drive through File Station, & view files with Office Online & Google Docs&132;&162; or directly open them with a Google Chrome&132;&162; office extension.\n\n Well-rounded backup solutions to secure data\n QNAP Net Bak Replicator supports real-time & scheduled data backup on Windows including Outlook email archiving. Apple Time Machine&174; is also supported to provide Mac&174; OS X users with a solution to effortlessly back up data to the TS-251+. The front panel USB (Universal Serial Bus) 3.0 port on the TS-251+ features a one-touch-copy function for you to instantly back up data on external drives to the TS-251+ with just one click, or alternatively to back up data from the TS-251+ to external drives. A wide range of third-party backup software such as Acronis&174; True Image & Symantec&174; Backup Exec are also supported.\n\n Disaster recovery solutions bring peace of mind\n The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time & scheduled data backup to remote QNAP NAS or FTP servers & synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained & for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to & restored from a range of cloud storage services, including Amazon&174; S3, Amazon&174; Glacier, Microsoft&174; Azure&132;&162;, Elephant Drive&174;, Dropbox&174;, Google Drive&132;&162;, Google Cloud Storage&132;&162;, & more.\n\n Volume & LUN snapshot simplifies restoration\n Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage.QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up & restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots per volume or LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, & quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.\n\n Comprehensive security options\n In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, & more. Administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorized access & breach even if the hard drives or the entire system were stolen.\n\n Secure access with VPN Server & VPN Client\n The TS-251+ can be a VPN server with L2TP/IPsec, Open VPN, & PPTP support, allowing you to securely access data shared within the private local network. The TS-251+ also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n\n File synchronization across devices & clouds\n Qsync utility turns your TS-251+ into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files & always have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization & group file sharing, greatly enhancing the flexibility of team projects & collaboration. It also supports centralized configuration, & means that you can remotely erase the Qsync folder on a lost device to avoid data breaches, & even restore it after you have retrieved the device. You can also install the Cloud Drive Sync app from QTS App Center to easily sync files with Google Drive&132;&162; & Dropbox&174; cloud storage.\n\n Comprehensive surveillance solution providing 24/7 security\n The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3, 000 compatible IP camera models, & expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording & playback with a wide range of customizable settings. You can also install the Vmobile app on your i OS&174; or Android&132;&162; devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels & you can expand up to 40 channels by purchasing additional licenses.\n\n Access & enjoy with your mobile devices\n The TS-251+ is your private cloud storage that virtually enlarges the capacity of your smart mobile devices. Qfile means that you can access, upload, download, manage, & share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an i OS&174; device, users can also browse videos & photos stored on the TS-251+ & play on a TV via Apple&174; TV. Qmanager lets you monitor & manage the TS-251+ remotely & efficiently without turning on your PC. You can take & share digital notes with Qnotes, & enjoy & share music, photos & videos on the TS-251+ anywhere & anytime with Qmusic, Qphoto & Qvideo apps.\n\n Install-on-demand apps to extend NAS functionality\n The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP & third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, & much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.\n\n LED indicators with adjustable brightness controls\n With adjustable 3-stage brightness controls for LED indicators, the TS-251+ provides flexible LED brightness options. Based on the surrounding environment, you can adjust the brightness of all system indicators & also schedule the system to automatically dim the LEDs at certain times when needed.\n\n Expand storage capacity easily\n The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on dem&, making the TS-251+ an ideal file center with large storage capacity for storage-intensive business applications.\n\n With the support of QJBOD Express (JBOD enclosures roaming), you can just connect a large capacity QNAP expansion enclosure to the TS-251+, & migrate data to another NAS through the JBOD enclosure without network connectivity.\n\n Energy-saving & eco-friendly\n The TS-251+ utilizes a 22nm CPU & DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, & Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.\n\n Easy-to-use NAS management tools\n\n The TS-251+ provides comprehensive system tools to increase management efficiency.\n\n Administrators can turn on the Turbo NAS via LAN to save energy & improve security.\n\n\n The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet & saves the data, enabling centralized log management with greater efficiency. Feature Feature Value Total installed storage capacity 6 TBStorage drives installed Y Installed storage drive type HDDNumber of storage drives installed 2 Supported storage drive types HDD, SSDNumber of storage drives supported 2 Storage drive capacity 3000 GBRAID support Y Hot-swap drive bays Y Supported storage drive interfaces Serial ATA II, Serial ATA IIIStorage drive sizes supported 2.5, 3.5"RAID levels 0, 1, JBODOnline RAID migration Y Online RAID expansion Y Supported file systems FAT32, HFS+, NTFS, ex FAT, ext 3, ext 4 Bad block scan Y Processor frequency 2 GHz Processor family Intel&174; Celeron&174; Processor cores 4 Internal memory 2 GBInternal memory type DDR3 L Memory clock speed 1600 MHz Maximum RAM supported 8 GBMemory slots 2x SODIMMFlash memory 512 MBEthernet LANYWi-Fi N Ethernet LAN data rates 10, 100, 1000 Mbit/s DHCP client YDHCP server Y Jumbo frames support Yi SCSI support Y Wake-on-LAN ready Y Supported network protocols CIFS/SMB, AFP v 3.3, NFS v 3, FTP, FTPS, SFTP, TFTP, HTTP (S), Telnet, SSH, i SCSI, SNMP, SMTP, SMSCLink aggregation Y Dynamic DNS (DDNS)YEthernet LAN (RJ-45) ports 2USB port YUSB 2.0 ports quantity 2USB 3.0 (3.1 Gen 1) Type-A ports quantity 2HDMI ports quantity 1 Chassis type Tower Cooling type Active Product colour Black Number of fans 1 fan (s) Fan diameter 7 cm LED indicators HDD, LAN, Power, Status, USBCable lock slot Y Cable lock slot type Kensington Type NASDevice class Home & Home Office Backup function Y Backup features Cloud, USB drive, i SCSI LUNBuzzer Y Noise level 15.4 d B Snapshot Y Management protocols SNMPSecurity algorithms 256-bit AES, FIPS 140-2, HTTPS, SSHWeb-based management Y Reset button Y On/off switch Y Built-in i Tunes server Y Built-in FTP server Y Browser supported Apple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox System log YS.M.A.R.T. support Y Share folder 512 Share folder access right management Y Remotely operated Y Backup button Y Universal Plug & Play (UPn P)YOperating system installed QNAP Turbo System Operating system version 4.3 Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Linux operating systems supported Y Mac compatibility Y Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Power supply location External Power supply unit (PSU) capacity 60 WPower consumption (typical)18.09 WPower consumption (sleep)0.57 WPower consumption (HDD standby)10.56 WAC input voltage 100
- 240 VFan voltage 12 VWidth 102 mm Depth 219 mm Height 169 mm Weight 1.28kg Package weight 2.32kg External power adapter Y Cables included AC, LAN (RJ-45) Quick installation guide Y Number of screws 14 Handheld remote control Y Operating temperature (T-T)0
- 40 &176;COperating relative humidity (H-H)5
- 95% Number of simultaneous users 4096 user (s)



...

Facing the increasing demand for data storage, sharing & multimedia processing, more & more users are looking for a NAS system with good performance & an affordable price tag. The Intel&174; quad-core TS-251+ provides an uncompromising high-performance scalable storage solution for professional users. Powered by the intelligent QTS 4.2 operating system, the TS-251+ performs as an easy-to-use yet powerful NAS for data backup, file synchronization & sharing, remote access & multimedia applications, & is ideal for users to create a secure private cloud to access their data easily.\n\n- Centralize your file storage, sharing & backup with excellent performance\n- Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n- Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n- Enjoy the best audio-visual experience with HDMI output & the free remote control\n- Transcode Full HD videos on-the-fly or offline\n- Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n- Quickly find specific files by real-time, natural search with Qsirch\n- Scale up to 10 drives with QNAP UX-800P expansion enclosure\n\n Quad-core 64-bit Intel&174; Celeron&174; CPU for exceptional performance\n The TS-251+ is powered by a 64-bit Intel&174; Celeron&174; quad-core 2.0 G Hz processor & has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) & dual Gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0 G Hz to 2.42 G Hz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.\n\n QTS 4.2
- Simple & efficient\n Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother & spectacular. Its modern flat design streamlines loading times, & the intelligent desktop means that you can quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, & open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms & geography to bring optimized cloud experiences to you, & incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, & more.\n\n Run additional operating systems on the TS-251+\n The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS & a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, & enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets & import them to the TS-251+ without any complex procedures.\n\n Container Station " LXC & Docker&174; Containers inclusive\n QNAP Container Station exclusively integrates LXC & Docker&174; lightweight virtualization technologies, allowing you to operate multiple isolated Linux&174; systems on the TS-251+ as well as download apps from the built-in Docker Hub&174; Registry. It supports container import/export & permission settings, & features an informative dashboard & flexible user interface for you to manage multiple containers. You can experience the amazing Container Station & enjoy the playground of virtual containers with the TS-251+. Container Station also supports Online Document app, which means that you can directly view, edit & store files of various types anytime on your NAS, including Office documents, images & text files.\n\n Real-time & offline video transcoding\n The TS-251+ delivers superior real-time video transcoding (up to 4K H.264) to convert your videos to formats that can be smoothly played on PCs, mobile devices & Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.\n\n With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also means that you can set a dedicated folder for automatic video transcoding.\n\n Enjoy media freely with multi-zone multimedia control\n Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage & stream photos, music & videos from the TS-251+ to different rooms from a single device using Bluetooth&174;& USB (Universal Serial Bus) devices connected to the TS-251+ (for music streaming only), HDMI, DLNA&174;, Apple TV&174; & Chromecast&132;&162;*. Every room member in different zones can enjoy the convenience & simplicity for media playback & multimedia storage.\n\n Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an i OS&174; device to browse videos/photos & play on the TV via Apple TV&174;, or transform the TS-251+ into a powerful streaming machine with DLNA&174;, Roku&174;, Amazon&174; Fire TV, & Google TV&132;&162; support with the support of Plex Media Server.\n\n Qsirch " A smarter, faster way to search\n Quickly & easily find documents, photos, videos, & music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, & Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.\n\n Cross-platform file sharing, centralized data storage\n The TS-251+ supports SMB/CIFS, NFS, & AFP protocols for file sharing across Windows&174;, Mac&174; & Linux&174;/UNIX&174;. Data, logs & ISO image of CDs & DVDs can be centrally stored in the TS-251+ & protected by an integrated antivirus solution.\n\n File Station integrated with cloud services\n The web-based File Station enables you to easily upload, download, & manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, & smart search for files & folders, the File Station also means that you can easily share files with colleagues & friends via unique URLs, email, & a shared space. What's even better, you can also directly browse & transfer files between the TS-251+ & public cloud services like Google Drive&132;&162;, Dropbox&174;, Microsoft&174; One Drive, Box&174;, Yandex&174; Disk & Amazon&174; Cloud Drive through File Station, & view files with Office Online & Google Docs&132;&162; or directly open them with a Google Chrome&132;&162; office extension.\n\n Well-rounded backup solutions to secure data\n QNAP Net Bak Replicator supports real-time & scheduled data backup on Windows including Outlook email archiving. Apple Time Machine&174; is also supported to provide Mac&174; OS X users with a solution to effortlessly back up data to the TS-251+. The front panel USB (Universal Serial Bus) 3.0 port on the TS-251+ features a one-touch-copy function for you to instantly back up data on external drives to the TS-251+ with just one click, or alternatively to back up data from the TS-251+ to external drives. A wide range of third-party backup software such as Acronis&174; True Image & Symantec&174; Backup Exec are also supported.\n\n Disaster recovery solutions bring peace of mind\n The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time & scheduled data backup to remote QNAP NAS or FTP servers & synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained & for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to & restored from a range of cloud storage services, including Amazon&174; S3, Amazon&174; Glacier, Microsoft&174; Azure&132;&162;, Elephant Drive&174;, Dropbox&174;, Google Drive&132;&162;, Google Cloud Storage&132;&162;, & more.\n\n Volume & LUN snapshot simplifies restoration\n Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage.QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up & restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots per volume or LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, & quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.\n\n Comprehensive security options\n In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, & more. Administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorized access & breach even if the hard drives or the entire system were stolen.\n\n Secure access with VPN Server & VPN Client\n The TS-251+ can be a VPN server with L2TP/IPsec, Open VPN, & PPTP support, allowing you to securely access data shared within the private local network. The TS-251+ also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n\n File synchronization across devices & clouds\n Qsync utility turns your TS-251+ into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files & always have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization & group file sharing, greatly enhancing the flexibility of team projects & collaboration. It also supports centralized configuration, & means that you can remotely erase the Qsync folder on a lost device to avoid data breaches, & even restore it after you have retrieved the device. You can also install the Cloud Drive Sync app from QTS App Center to easily sync files with Google Drive&132;&162; & Dropbox&174; cloud storage.\n\n Comprehensive surveillance solution providing 24/7 security\n The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3, 000 compatible IP camera models, & expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording & playback with a wide range of customizable settings. You can also install the Vmobile app on your i OS&174; or Android&132;&162; devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels & you can expand up to 40 channels by purchasing additional licenses.\n\n Access & enjoy with your mobile devices\n The TS-251+ is your private cloud storage that virtually enlarges the capacity of your smart mobile devices. Qfile means that you can access, upload, download, manage, & share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an i OS&174; device, users can also browse videos & photos stored on the TS-251+ & play on a TV via Apple&174; TV. Qmanager lets you monitor & manage the TS-251+ remotely & efficiently without turning on your PC. You can take & share digital notes with Qnotes, & enjoy & share music, photos & videos on the TS-251+ anywhere & anytime with Qmusic, Qphoto & Qvideo apps.\n\n Install-on-demand apps to extend NAS functionality\n The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP & third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, & much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.\n\n LED indicators with adjustable brightness controls\n With adjustable 3-stage brightness controls for LED indicators, the TS-251+ provides flexible LED brightness options. Based on the surrounding environment, you can adjust the brightness of all system indicators & also schedule the system to automatically dim the LEDs at certain times when needed.\n\n Expand storage capacity easily\n The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on dem&, making the TS-251+ an ideal file center with large storage capacity for storage-intensive business applications.\n\n With the support of QJBOD Express (JBOD enclosures roaming), you can just connect a large capacity QNAP expansion enclosure to the TS-251+, & migrate data to another NAS through the JBOD enclosure without network connectivity.\n\n Energy-saving & eco-friendly\n The TS-251+ utilizes a 22nm CPU & DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, & Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.\n\n Easy-to-use NAS management tools\n\n The TS-251+ provides comprehensive system tools to increase management efficiency.\n\n Administrators can turn on the Turbo NAS via LAN to save energy & improve security.\n\n\n The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet & saves the data, enabling centralized log management with greater efficiency. Feature Feature Value Total installed storage capacity 4 TBStorage drives installed Y Installed storage drive type HDDSupported storage drive types HDD, SSDNumber of storage drives supported 2RAID support Y Hot-swap drive bays Y Supported storage drive interfaces Serial ATA II, Serial ATA IIIStorage drive sizes supported 2.5, 3.5"RAID levels 0, 1, JBODOnline RAID migration Y Online RAID expansion Y Supported file systems FAT32, HFS+, NTFS, ex FAT, ext 3, ext 4 Bad block scan Y Processor frequency 2 GHz Processor family Intel&174; Celeron&174; Processor cores 4 Internal memory 2 GBInternal memory type DDR3 L Memory clock speed 1600 MHz Maximum RAM supported 8 GBMemory slots 2x SODIMMFlash memory 512 MBEthernet LANYWi-Fi N Ethernet LAN data rates 10, 100, 1000 Mbit/s DHCP client YDHCP server Y Jumbo frames support Yi SCSI support Y Wake-on-LAN ready Y Supported network protocols CIFS/SMB, AFP v 3.3, NFS v 3, FTP, FTPS, SFTP, TFTP, HTTP (S), Telnet, SSH, i SCSI, SNMP, SMTP, SMSCLink aggregation Y Dynamic DNS (DDNS)YEthernet LAN (RJ-45) ports 2USB port YUSB 2.0 ports quantity 2USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity 2HDMI ports quantity 1 Chassis type Tower Cooling type Active Product colour Black Number of fans 1 fan (s) Fan diameter 7 cm LED indicators HDD, LAN, Power, Status, USBCable lock slot Y Cable lock slot type Kensington Type NASDevice class Home & Home Office Backup function Y Backup features Cloud, USB drive, i SCSI LUNBuzzer Y Noise level 15.4 d B Snapshot Y Management protocols SNMPSecurity algorithms 256-bit AES, FIPS 140-2, HTTPS, SSHWeb-based management Y Reset button Y On/off switch Y Built-in i Tunes server Y Built-in FTP server Y Browser supported Apple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox System log YS.M.A.R.T. support Y Share folder 512 Share folder access right management Y Remotely operated Y Backup button Y Universal Plug & Play (UPn P)YOperating system installed QNAP Turbo System Operating system version 4.3 Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Linux operating systems supported Y Mac compatibility Y Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Power supply location External Power supply unit (PSU) capacity 60 WPower consumption (typical)18.09 WPower consumption (sleep)0.57 WPower consumption (HDD standby)10.56 WAC input voltage 100
- 240 VFan voltage 12 VWidth 102 mm Depth 219 mm Height 169 mm Weight 1.28kg Package weight 2.32kg External power adapter Y Cables included AC, LAN (RJ-45) Quick installation guide Y Number of screws 14 Handheld remote control Y Operating temperature (T-T)0
- 40 &176;COperating relative humidity (H-H)5
- 95% Number of simultaneous users 4096 user (s)



...

Facing the increasing demand for data storage, sharing & multimedia processing, more & more users are looking for a NAS system with good performance & an affordable price tag. The Intel&174; quad-core TS-251+ provides an uncompromising high-performance scalable storage solution for professional users. Powered by the intelligent QTS 4.2 operating system, the TS-251+ performs as an easy-to-use yet powerful NAS for data backup, file synchronization & sharing, remote access & multimedia applications, & is ideal for users to create a secure private cloud to access their data easily.\n\n- Centralize your file storage, sharing & backup with excellent performance\n- Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n- Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n- Enjoy the best audio-visual experience with HDMI output & the free remote control\n- Transcode Full HD videos on-the-fly or offline\n- Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n- Quickly find specific files by real-time, natural search with Qsirch\n- Scale up to 10 drives with QNAP UX-800P expansion enclosure\n\n Quad-core 64-bit Intel&174; Celeron&174; CPU for exceptional performance\n The TS-251+ is powered by a 64-bit Intel&174; Celeron&174; quad-core 2.0 G Hz processor & has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) & dual Gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0 G Hz to 2.42 G Hz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.\n\n QTS 4.2
- Simple & efficient\n Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother & spectacular. Its modern flat design streamlines loading times, & the intelligent desktop means that you can quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, & open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms & geography to bring optimized cloud experiences to you, & incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, & more.\n\n Run additional operating systems on the TS-251+\n The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS & a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, & enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets & import them to the TS-251+ without any complex procedures.\n\n Container Station " LXC & Docker&174; Containers inclusive\n QNAP Container Station exclusively integrates LXC & Docker&174; lightweight virtualization technologies, allowing you to operate multiple isolated Linux&174; systems on the TS-251+ as well as download apps from the built-in Docker Hub&174; Registry. It supports container import/export & permission settings, & features an informative dashboard & flexible user interface for you to manage multiple containers. You can experience the amazing Container Station & enjoy the playground of virtual containers with the TS-251+. Container Station also supports Online Document app, which means that you can directly view, edit & store files of various types anytime on your NAS, including Office documents, images & text files.\n\n Real-time & offline video transcoding\n The TS-251+ delivers superior real-time video transcoding (up to 4K H.264) to convert your videos to formats that can be smoothly played on PCs, mobile devices & Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.\n\n With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also means that you can set a dedicated folder for automatic video transcoding.\n\n Enjoy media freely with multi-zone multimedia control\n Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage & stream photos, music & videos from the TS-251+ to different rooms from a single device using Bluetooth&174;& USB (Universal Serial Bus) devices connected to the TS-251+ (for music streaming only), HDMI, DLNA&174;, Apple TV&174; & Chromecast&132;&162;*. Every room member in different zones can enjoy the convenience & simplicity for media playback & multimedia storage.\n\n Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an i OS&174; device to browse videos/photos & play on the TV via Apple TV&174;, or transform the TS-251+ into a powerful streaming machine with DLNA&174;, Roku&174;, Amazon&174; Fire TV, & Google TV&132;&162; support with the support of Plex Media Server.\n\n Qsirch " A smarter, faster way to search\n Quickly & easily find documents, photos, videos, & music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, & Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.\n\n Cross-platform file sharing, centralized data storage\n The TS-251+ supports SMB/CIFS, NFS, & AFP protocols for file sharing across Windows&174;, Mac&174; & Linux&174;/UNIX&174;. Data, logs & ISO image of CDs & DVDs can be centrally stored in the TS-251+ & protected by an integrated antivirus solution.\n\n File Station integrated with cloud services\n The web-based File Station enables you to easily upload, download, & manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, & smart search for files & folders, the File Station also means that you can easily share files with colleagues & friends via unique URLs, email, & a shared space. What's even better, you can also directly browse & transfer files between the TS-251+ & public cloud services like Google Drive&132;&162;, Dropbox&174;, Microsoft&174; One Drive, Box&174;, Yandex&174; Disk & Amazon&174; Cloud Drive through File Station, & view files with Office Online & Google Docs&132;&162; or directly open them with a Google Chrome&132;&162; office extension.\n\n Well-rounded backup solutions to secure data\n QNAP Net Bak Replicator supports real-time & scheduled data backup on Windows including Outlook email archiving. Apple Time Machine&174; is also supported to provide Mac&174; OS X users with a solution to effortlessly back up data to the TS-251+. The front panel USB (Universal Serial Bus) 3.0 port on the TS-251+ features a one-touch-copy function for you to instantly back up data on external drives to the TS-251+ with just one click, or alternatively to back up data from the TS-251+ to external drives. A wide range of third-party backup software such as Acronis&174; True Image & Symantec&174; Backup Exec are also supported.\n\n Disaster recovery solutions bring peace of mind\n The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time & scheduled data backup to remote QNAP NAS or FTP servers & synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained & for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to & restored from a range of cloud storage services, including Amazon&174; S3, Amazon&174; Glacier, Microsoft&174; Azure&132;&162;, Elephant Drive&174;, Dropbox&174;, Google Drive&132;&162;, Google Cloud Storage&132;&162;, & more.\n\n Volume & LUN snapshot simplifies restoration\n Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage.QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up & restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots per volume or LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, & quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.\n\n Comprehensive security options\n In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, & more. Administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorized access & breach even if the hard drives or the entire system were stolen.\n\n Secure access with VPN Server & VPN Client\n The TS-251+ can be a VPN server with L2TP/IPsec, Open VPN, & PPTP support, allowing you to securely access data shared within the private local network. The TS-251+ also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n\n File synchronization across devices & clouds\n Qsync utility turns your TS-251+ into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files & always have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization & group file sharing, greatly enhancing the flexibility of team projects & collaboration. It also supports centralized configuration, & means that you can remotely erase the Qsync folder on a lost device to avoid data breaches, & even restore it after you have retrieved the device. You can also install the Cloud Drive Sync app from QTS App Center to easily sync files with Google Drive&132;&162; & Dropbox&174; cloud storage.\n\n Comprehensive surveillance solution providing 24/7 security\n The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3, 000 compatible IP camera models, & expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording & playback with a wide range of customizable settings. You can also install the Vmobile app on your i OS&174; or Android&132;&162; devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels & you can expand up to 40 channels by purchasing additional licenses.\n\n Access & enjoy with your mobile devices\n The TS-251+ is your private cloud storage that virtually enlarges the capacity of your smart mobile devices. Qfile means that you can access, upload, download, manage, & share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an i OS&174; device, users can also browse videos & photos stored on the TS-251+ & play on a TV via Apple&174; TV. Qmanager lets you monitor & manage the TS-251+ remotely & efficiently without turning on your PC. You can take & share digital notes with Qnotes, & enjoy & share music, photos & videos on the TS-251+ anywhere & anytime with Qmusic, Qphoto & Qvideo apps.\n\n Install-on-demand apps to extend NAS functionality\n The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP & third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, & much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.\n\n LED indicators with adjustable brightness controls\n With adjustable 3-stage brightness controls for LED indicators, the TS-251+ provides flexible LED brightness options. Based on the surrounding environment, you can adjust the brightness of all system indicators & also schedule the system to automatically dim the LEDs at certain times when needed.\n\n Expand storage capacity easily\n The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on dem&, making the TS-251+ an ideal file center with large storage capacity for storage-intensive business applications.\n\n With the support of QJBOD Express (JBOD enclosures roaming), you can just connect a large capacity QNAP expansion enclosure to the TS-251+, & migrate data to another NAS through the JBOD enclosure without network connectivity.\n\n Energy-saving & eco-friendly\n The TS-251+ utilizes a 22nm CPU & DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, & Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.\n\n Easy-to-use NAS management tools\n\n The TS-251+ provides comprehensive system tools to increase management efficiency.\n\n Administrators can turn on the Turbo NAS via LAN to save energy & improve security.\n\n\n The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet & saves the data, enabling centralized log management with greater efficiency. Feature Feature Value Total installed storage capacity 2 TBStorage drives installed Y Installed storage drive type HDDSupported storage drive types HDD, SSDNumber of storage drives supported 2RAID support Y Hot-swap drive bays Y Supported storage drive interfaces Serial ATA II, Serial ATA IIIStorage drive sizes supported 2.5, 3.5"RAID levels 0, 1, JBODOnline RAID migration Y Online RAID expansion Y Supported file systems FAT32, HFS+, NTFS, ex FAT, ext 3, ext 4 Bad block scan Y Processor frequency 2 GHz Processor family Intel&174; Celeron&174; Processor cores 4 Internal memory 2 GBInternal memory type DDR3 L Memory clock speed 1600 MHz Maximum RAM supported 8 GBMemory slots 2x SODIMMFlash memory 512 MBEthernet LANYWi-Fi N Ethernet LAN data rates 10, 100, 1000 Mbit/s DHCP client YDHCP server Y Jumbo frames support Yi SCSI support Y Wake-on-LAN ready Y Supported network protocols CIFS/SMB, AFP v 3.3, NFS v 3, FTP, FTPS, SFTP, TFTP, HTTP (S), Telnet, SSH, i SCSI, SNMP, SMTP, SMSCLink aggregation Y Dynamic DNS (DDNS)YEthernet LAN (RJ-45) ports 2USB port YUSB 2.0 ports quantity 2USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity 2HDMI ports quantity 1 Chassis type Tower Cooling type Active Product colour Black Number of fans 1 fan (s) Fan diameter 7 cm LED indicators HDD, LAN, Power, Status, USBCable lock slot Y Cable lock slot type Kensington Type NASDevice class Home & Home Office Backup function Y Backup features Cloud, USB drive, i SCSI LUNBuzzer Y Noise level 15.4 d B Snapshot Y Management protocols SNMPSecurity algorithms 256-bit AES, FIPS 140-2, HTTPS, SSHWeb-based management Y Reset button Y On/off switch Y Built-in i Tunes server Y Built-in FTP server Y Browser supported Apple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox System log YS.M.A.R.T. support Y Share folder 512 Share folder access right management Y Remotely operated Y Backup button Y Universal Plug & Play (UPn P)YOperating system installed QNAP Turbo System Operating system version 4.3 Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Linux operating systems supported Y Mac compatibility Y Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Power supply location External Power supply unit (PSU) capacity 60 WPower consumption (typical)18.09 WPower consumption (sleep)0.57 WPower consumption (HDD standby)10.56 WAC input voltage 100
- 240 VFan voltage 12 VWidth 102 mm Depth 219 mm Height 169 mm Weight 1.28kg Package weight 2.32kg External power adapter Y Cables included AC, LAN (RJ-45) Quick installation guide Y Number of screws 14 Handheld remote control Y Operating temperature (T-T)0
- 40 &176;COperating relative humidity (H-H)5
- 95% Number of simultaneous users 4096 user (s)



...

Facing the increasing demand for data storage, sharing & multimedia processing, more & more users are looking for a NAS system with good performance & an affordable price tag. The Intel&174; quad-core TS-251+ provides an uncompromising high-performance scalable storage solution for professional users. Powered by the intelligent QTS 4.2 operating system, the TS-251+ performs as an easy-to-use yet powerful NAS for data backup, file synchronization & sharing, remote access & multimedia applications, & is ideal for users to create a secure private cloud to access their data easily.\n\n- Centralize your file storage, sharing & backup with excellent performance\n- Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n- Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n- Enjoy the best audio-visual experience with HDMI output & the free remote control\n- Transcode Full HD videos on-the-fly or offline\n- Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n- Quickly find specific files by real-time, natural search with Qsirch\n- Scale up to 10 drives with QNAP UX-800P expansion enclosure\n\n Quad-core 64-bit Intel&174; Celeron&174; CPU for exceptional performance\n The TS-251+ is powered by a 64-bit Intel&174; Celeron&174; quad-core 2.0 G Hz processor & has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) & dual Gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0 G Hz to 2.42 G Hz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.\n\n QTS 4.2
- Simple & efficient\n Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother & spectacular. Its modern flat design streamlines loading times, & the intelligent desktop means that you can quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, & open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms & geography to bring optimized cloud experiences to you, & incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, & more.\n\n Run additional operating systems on the TS-251+\n The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS & a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, & enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets & import them to the TS-251+ without any complex procedures.\n\n Container Station " LXC & Docker&174; Containers inclusive\n QNAP Container Station exclusively integrates LXC & Docker&174; lightweight virtualization technologies, allowing you to operate multiple isolated Linux&174; systems on the TS-251+ as well as download apps from the built-in Docker Hub&174; Registry. It supports container import/export & permission settings, & features an informative dashboard & flexible user interface for you to manage multiple containers. You can experience the amazing Container Station & enjoy the playground of virtual containers with the TS-251+. Container Station also supports Online Document app, which means that you can directly view, edit & store files of various types anytime on your NAS, including Office documents, images & text files.\n\n Real-time & offline video transcoding\n The TS-251+ delivers superior real-time video transcoding (up to 4K H.264) to convert your videos to formats that can be smoothly played on PCs, mobile devices & Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.\n\n With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also means that you can set a dedicated folder for automatic video transcoding.\n\n Enjoy media freely with multi-zone multimedia control\n Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage & stream photos, music & videos from the TS-251+ to different rooms from a single device using Bluetooth&174;& USB (Universal Serial Bus) devices connected to the TS-251+ (for music streaming only), HDMI, DLNA&174;, Apple TV&174; & Chromecast&132;&162;*. Every room member in different zones can enjoy the convenience & simplicity for media playback & multimedia storage.\n\n Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an i OS&174; device to browse videos/photos & play on the TV via Apple TV&174;, or transform the TS-251+ into a powerful streaming machine with DLNA&174;, Roku&174;, Amazon&174; Fire TV, & Google TV&132;&162; support with the support of Plex Media Server.\n\n Qsirch " A smarter, faster way to search\n Quickly & easily find documents, photos, videos, & music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, & Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.\n\n Cross-platform file sharing, centralized data storage\n The TS-251+ supports SMB/CIFS, NFS, & AFP protocols for file sharing across Windows&174;, Mac&174; & Linux&174;/UNIX&174;. Data, logs & ISO image of CDs & DVDs can be centrally stored in the TS-251+ & protected by an integrated antivirus solution.\n\n File Station integrated with cloud services\n The web-based File Station enables you to easily upload, download, & manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, & smart search for files & folders, the File Station also means that you can easily share files with colleagues & friends via unique URLs, email, & a shared space. What's even better, you can also directly browse & transfer files between the TS-251+ & public cloud services like Google Drive&132;&162;, Dropbox&174;, Microsoft&174; One Drive, Box&174;, Yandex&174; Disk & Amazon&174; Cloud Drive through File Station, & view files with Office Online & Google Docs&132;&162; or directly open them with a Google Chrome&132;&162; office extension.\n\n Well-rounded backup solutions to secure data\n QNAP Net Bak Replicator supports real-time & scheduled data backup on Windows including Outlook email archiving. Apple Time Machine&174; is also supported to provide Mac&174; OS X users with a solution to effortlessly back up data to the TS-251+. The front panel USB (Universal Serial Bus) 3.0 port on the TS-251+ features a one-touch-copy function for you to instantly back up data on external drives to the TS-251+ with just one click, or alternatively to back up data from the TS-251+ to external drives. A wide range of third-party backup software such as Acronis&174; True Image & Symantec&174; Backup Exec are also supported.\n\n Disaster recovery solutions bring peace of mind\n The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time & scheduled data backup to remote QNAP NAS or FTP servers & synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained & for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to & restored from a range of cloud storage services, including Amazon&174; S3, Amazon&174; Glacier, Microsoft&174; Azure&132;&162;, Elephant Drive&174;, Dropbox&174;, Google Drive&132;&162;, Google Cloud Storage&132;&162;, & more.\n\n Volume & LUN snapshot simplifies restoration\n Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage.QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up & restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots per volume or LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, & quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.\n\n Comprehensive security options\n In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, & more. Administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorized access & breach even if the hard drives or the entire system were stolen.\n\n Secure access with VPN Server & VPN Client\n The TS-251+ can be a VPN server with L2TP/IPsec, Open VPN, & PPTP support, allowing you to securely access data shared within the private local network. The TS-251+ also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n\n File synchronization across devices & clouds\n Qsync utility turns your TS-251+ into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files & always have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization & group file sharing, greatly enhancing the flexibility of team projects & collaboration. It also supports centralized configuration, & means that you can remotely erase the Qsync folder on a lost device to avoid data breaches, & even restore it after you have retrieved the device. You can also install the Cloud Drive Sync app from QTS App Center to easily sync files with Google Drive&132;&162; & Dropbox&174; cloud storage.\n\n Comprehensive surveillance solution providing 24/7 security\n The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3, 000 compatible IP camera models, & expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording & playback with a wide range of customizable settings. You can also install the Vmobile app on your i OS&174; or Android&132;&162; devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels & you can expand up to 40 channels by purchasing additional licenses.\n\n Access & enjoy with your mobile devices\n The TS-251+ is your private cloud storage that virtually enlarges the capacity of your smart mobile devices. Qfile means that you can access, upload, download, manage, & share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an i OS&174; device, users can also browse videos & photos stored on the TS-251+ & play on a TV via Apple&174; TV. Qmanager lets you monitor & manage the TS-251+ remotely & efficiently without turning on your PC. You can take & share digital notes with Qnotes, & enjoy & share music, photos & videos on the TS-251+ anywhere & anytime with Qmusic, Qphoto & Qvideo apps.\n\n Install-on-demand apps to extend NAS functionality\n The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP & third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, & much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.\n\n LED indicators with adjustable brightness controls\n With adjustable 3-stage brightness controls for LED indicators, the TS-251+ provides flexible LED brightness options. Based on the surrounding environment, you can adjust the brightness of all system indicators & also schedule the system to automatically dim the LEDs at certain times when needed.\n\n Expand storage capacity easily\n The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on dem&, making the TS-251+ an ideal file center with large storage capacity for storage-intensive business applications.\n\n With the support of QJBOD Express (JBOD enclosures roaming), you can just connect a large capacity QNAP expansion enclosure to the TS-251+, & migrate data to another NAS through the JBOD enclosure without network connectivity.\n\n Energy-saving & eco-friendly\n The TS-251+ utilizes a 22nm CPU & DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, & Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.\n\n Easy-to-use NAS management tools\n\n The TS-251+ provides comprehensive system tools to increase management efficiency.\n\n Administrators can turn on the Turbo NAS via LAN to save energy & improve security.\n\n\n The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet & saves the data, enabling centralized log management with greater efficiency. Feature Feature Value Total installed storage capacity 4 TBStorage drives installed Y Installed storage drive type HDDSupported storage drive types HDD, SSDNumber of storage drives supported 2RAID support Y Hot-swap drive bays Y Supported storage drive interfaces Serial ATA II, Serial ATA IIIStorage drive sizes supported 2.5, 3.5"RAID levels 0, 1, JBODOnline RAID migration Y Online RAID expansion Y Supported file systems FAT32, HFS+, NTFS, ex FAT, ext 3, ext 4 Bad block scan Y Processor frequency 2 GHz Processor family Intel&174; Celeron&174; Processor cores 4 Internal memory 2 GBInternal memory type DDR3 L Memory clock speed 1600 MHz Maximum RAM supported 8 GBMemory slots 2x SODIMMFlash memory 512 MBEthernet LANYWi-Fi N Ethernet LAN data rates 10, 100, 1000 Mbit/s DHCP client YDHCP server Y Jumbo frames support Yi SCSI support Y Wake-on-LAN ready Y Supported network protocols CIFS/SMB, AFP v 3.3, NFS v 3, FTP, FTPS, SFTP, TFTP, HTTP (S), Telnet, SSH, i SCSI, SNMP, SMTP, SMSCLink aggregation Y Dynamic DNS (DDNS)YEthernet LAN (RJ-45) ports 2USB port YUSB 2.0 ports quantity 2USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity 2HDMI ports quantity 1 Chassis type Tower Cooling type Active Product colour Black Number of fans 1 fan (s) Fan diameter 7 cm LED indicators HDD, LAN, Power, Status, USBCable lock slot Y Cable lock slot type Kensington Type NASDevice class Home & Home Office Backup function Y Backup features Cloud, USB drive, i SCSI LUNBuzzer Y Noise level 15.4 d B Snapshot Y Management protocols SNMPSecurity algorithms 256-bit AES, FIPS 140-2, HTTPS, SSHWeb-based management Y Reset button Y On/off switch Y Built-in i Tunes server Y Built-in FTP server Y Browser supported Apple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox System log YS.M.A.R.T. support Y Share folder 512 Share folder access right management Y Remotely operated Y Backup button Y Universal Plug & Play (UPn P)YOperating system installed QNAP Turbo System Operating system version 4.3 Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Linux operating systems supported Y Mac compatibility Y Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Power supply location External Power supply unit (PSU) capacity 60 WPower consumption (typical)18.09 WPower consumption (sleep)0.57 WPower consumption (HDD standby)10.56 WAC input voltage 100
- 240 VFan voltage 12 VWidth 102 mm Depth 219 mm Height 169 mm Weight 1.28kg Package weight 2.32kg External power adapter Y Cables included AC, LAN (RJ-45) Quick installation guide Y Number of screws 14 Handheld remote control Y Operating temperature (T-T)0
- 40 &176;COperating relative humidity (H-H)5
- 95% Number of simultaneous users 4096 user (s)



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Facing the increasing demand for data storage, sharing & multimedia processing, more & more users are looking for a NAS system with good performance & an affordable price tag. The Intel&174; quad-core TS-251+ provides an uncompromising high-performance scalable storage solution for professional users. Powered by the intelligent QTS 4.2 operating system, the TS-251+ performs as an easy-to-use yet powerful NAS for data backup, file synchronization & sharing, remote access & multimedia applications, & is ideal for users to create a secure private cloud to access their data easily.\n \n
- Centralize your file storage, sharing & backup with excellent performance\n
- Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n
- Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n
- Enjoy the best audio-visual experience with HDMI output & the free remote control\n
- Transcode Full HD videos on-the-fly or offline\n
- Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n
- Quickly find specific files by real-time, natural search with Qsirch\n
- Scale up to 10 drives with QNAP UX-800P expansion enclosure\n \n Quad-core 64-bit Intel&174; Celeron&174; CPU for exceptional performance\n The TS-251+ is powered by a 64-bit Intel&174; Celeron&174; quad-core 2.0 G Hz processor & has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) & dual Gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0 G Hz to 2.42 G Hz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.\n \n QTS 4.2
- Simple & efficient\n Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother & spectacular. Its modern flat design streamlines loading times, & the intelligent desktop means that you can quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, & open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms & geography to bring optimized cloud experiences to you, & incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, & more.\n \n Run additional operating systems on the TS-251+\n The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS & a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, & enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets & import them to the TS-251+ without any complex procedures.\n \n Container Station " LXC & Docker&174; Containers inclusive\n QNAP Container Station exclusively integrates LXC & Docker&174; lightweight virtualization technologies, allowing you to operate multiple isolated Linux&174; systems on the TS-251+ as well as download apps from the built-in Docker Hub&174; Registry. It supports container import/export & permission settings, & features an informative dashboard & flexible user interface for you to manage multiple containers. You can experience the amazing Container Station & enjoy the playground of virtual containers with the TS-251+. Container Station also supports Online Document app, which means that you can directly view, edit & store files of various types anytime on your NAS, including Office documents, images & text files.\n \n Real-time & offline video transcoding\n The TS-251+ delivers superior real-time video transcoding (up to 4K H.264) to convert your videos to formats that can be smoothly played on PCs, mobile devices & Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.\n \n With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also means that you can set a dedicated folder for automatic video transcoding.\n \n Enjoy media freely with multi-zone multimedia control\n Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage & stream photos, music & videos from the TS-251+ to different rooms from a single device using Bluetooth&174;& USB (Universal Serial Bus) devices connected to the TS-251+ (for music streaming only), HDMI, DLNA&174;, Apple TV&174; & Chromecast&132;&162;*. Every room member in different zones can enjoy the convenience & simplicity for media playback & multimedia storage.\n \n Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an i OS&174; device to browse videos/photos & play on the TV via Apple TV&174;, or transform the TS-251+ into a powerful streaming machine with DLNA&174;, Roku&174;, Amazon&174; Fire TV, & Google TV&132;&162; support with the support of Plex Media Server.\n \n Qsirch " A smarter, faster way to search\n Quickly & easily find documents, photos, videos, & music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, & Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.\n \n Cross-platform file sharing, centralized data storage\n The TS-251+ supports SMB/CIFS, NFS, & AFP protocols for file sharing across Windows&174;, Mac&174; & Linux&174;/UNIX&174;. Data, logs & ISO image of CDs & DVDs can be centrally stored in the TS-251+ & protected by an integrated antivirus solution.\n \n File Station integrated with cloud services\n The web-based File Station enables you to easily upload, download, & manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, & smart search for files & folders, the File Station also means that you can easily share files with colleagues & friends via unique URLs, email, & a shared space. What's even better, you can also directly browse & transfer files between the TS-251+ & public cloud services like Google Drive&132;&162;, Dropbox&174;, Microsoft&174; One Drive, Box&174;, Yandex&174; Disk & Amazon&174; Cloud Drive through File Station, & view files with Office Online & Google Docs&132;&162; or directly open them with a Google Chrome&132;&162; office extension.\n \n Well-rounded backup solutions to secure data\n QNAP Net Bak Replicator supports real-time & scheduled data backup on Windows including Outlook email archiving. Apple Time Machine&174; is also supported to provide Mac&174; OS X users with a solution to effortlessly back up data to the TS-251+. The front panel USB (Universal Serial Bus) 3.0 port on the TS-251+ features a one-touch-copy function for you to instantly back up data on external drives to the TS-251+ with just one click, or alternatively to back up data from the TS-251+ to external drives. A wide range of third-party backup software such as Acronis&174; True Image & Symantec&174; Backup Exec are also supported.\n \n Disaster recovery solutions bring peace of mind\n The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time & scheduled data backup to remote QNAP NAS or FTP servers & synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained & for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to & restored from a range of cloud storage services, including Amazon&174; S3, Amazon&174; Glacier, Microsoft&174; Azure&132;&162;, Elephant Drive&174;, Dropbox&174;, Google Drive&132;&162;, Google Cloud Storage&132;&162;, & more.\n \n Volume & LUN snapshot simplifies restoration\n Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage.QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up & restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots per volume or LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, & quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.\n \n Comprehensive security options\n In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, & more. Administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorized access & breach even if the hard drives or the entire system were stolen.\n \n Secure access with VPN Server & VPN Client\n The TS-251+ can be a VPN server with L2TP/IPsec, Open VPN, & PPTP support, allowing you to securely access data shared within the private local network. The TS-251+ also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n \n File synchronization across devices & clouds\n Qsync utility turns your TS-251+ into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files & always have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization & group file sharing, greatly enhancing the flexibility of team projects & collaboration. It also supports centralized configuration, & means that you can remotely erase the Qsync folder on a lost device to avoid data breaches, & even restore it after you have retrieved the device. You can also install the Cloud Drive Sync app from QTS App Center to easily sync files with Google Drive&132;&162; & Dropbox&174; cloud storage.\n \n Comprehensive surveillance solution providing 24/7 security\n The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3, 000 compatible IP camera models, & expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording & playback with a wide range of customizable settings. You can also install the Vmobile app on your i OS&174; or Android&132;&162; devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels & you can expand up to 40 channels by purchasing additional licenses.\n \n Access & enjoy with your mobile devices\n The TS-251+ is your private cloud storage that virtually enlarges the capacity of your smart mobile devices. Qfile means that you can access, upload, download, manage, & share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an i OS&174; device, users can also browse videos & photos stored on the TS-251+ & play on a TV via Apple&174; TV. Qmanager lets you monitor & manage the TS-251+ remotely & efficiently without turning on your PC. You can take & share digital notes with Qnotes, & enjoy & share music, photos & videos on the TS-251+ anywhere & anytime with Qmusic, Qphoto & Qvideo apps.\n \n Install-on-demand apps to extend NAS functionality\n The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP & third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, & much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.\n \n LED indicators with adjustable brightness controls\n With adjustable 3-stage brightness controls for LED indicators, the TS-251+ provides flexible LED brightness options. Based on the surrounding environment, you can adjust the brightness of all system indicators & also schedule the system to automatically dim the LEDs at certain times when needed.\n \n Expand storage capacity easily\n The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on dem&, making the TS-251+ an ideal file center with large storage capacity for storage-intensive business applications.\n \n With the support of QJBOD Express (JBOD enclosures roaming), you can just connect a large capacity QNAP expansion enclosure to the TS-251+, & migrate data to another NAS through the JBOD enclosure without network connectivity.\n \n Energy-saving & eco-friendly\n The TS-251+ utilizes a 22nm CPU & DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, & Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.\n \n Easy-to-use NAS management tools\n \n The TS-251+ provides comprehensive system tools to increase management efficiency.\n \n Administrators can turn on the Turbo NAS via LAN to save energy & improve security.\n \n \n The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet & saves the data, enabling centralized log management with greater efficiency.\n\n class="generic"> Storage Total installed storage capacity 8 TBOnline RAID migration Yes Online RAID expansion Yes Bad block scan Yes Storage drives installed Yes Installed storage drive type HDDSupported storage drive types HDD, SSDNumber of storage drives supported 2 Hot-swap drive bays Yes RAID support Yes Supported file systems FAT32, HFS+, NTFS, ex FAT, ext 3, ext 4RAID levels 0, 1, JBODSupported storage drive interfaces Serial ATA II, Serial ATA IIIStorage drive sizes supported 2.5, 3.5 Processor Processor frequency 2 GHz Processor family Intel&174; Celeron&174; Processor cores 4 Memory Internal memory type DDR3 L Internal memory 2 GBMemory clock speed 1600 MHz Maximum RAM supported 8 GBMemory slots 2x SODIMMFlash memory 512 MBNetworking Link aggregation Yes Dynamic DNS (DDNS) Yes Ethernet LANYes Ethernet LAN data rates 10, 100, 1000 Mbit/s Wi-Fi No Wake-on-LAN ready Yes Supported network protocols CIFS/SMB, AFP v 3.3, NFS v 3, FTP, FTPS, SFTP, TFTP, HTTP (S), Telnet, SSH, i SCSI, SNMP, SMTP, SMSCJumbo frames support Yesi SCSI support Yes DHCP server Yes DHCP client Yes Ports & interfaces USB port Yes USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity 2USB 2.0 ports quantity 2HDMI ports quantity 1 Ethernet LAN (RJ-45) ports 2 Hard drive RAID support Yes Supported file systems FAT32, HFS+, NTFS, ex FAT, ext 3, ext 4RAID levels 0, 1, JBODDesign Cooling type Active Fan diameter 7 cm Cable lock slot type Kensington Product colour Black Number of fans 1 fan (s)LED indicators HDD, LAN, Power, Status, USBChassis type Tower Cable lock slot Yes Technical details Type NASDevice class Home & Home Office Backup function Yes Backup features Cloud, USB drive, i SCSI LUNProduct colour Black Noise level 15.4 d BLED indicators HDD, LAN, Power, Status, USBChassis type Tower Buzzer Yes Number of simultaneous users 4096 user (s) Number of fans 1 fan (s) Performance Built-in i Tunes server Yes Built-in FTP server Yes System log Yes Share folder access right management Yes Share folder 512S.M.A.R.T. support Yes Browser supported Apple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox Mac compatibility Yes Remotely operated Yes Backup button Yes Universal Plug & Play (UPn P) Yes Type NASDevice class Home & Home Office Backup function Yes Backup features Cloud, USB drive, i SCSI LUNOn/off switch Yes Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Linux operating systems supported Yes Web-based management Yes Security algorithms 256-bit AES, FIPS 140-2, HTTPS, SSHReset button Yes Operating system version 4.3 Operating system installed QNAP Turbo System Noise level 15.4 d B Management protocols SNMPBuzzer Yes Snapshot Yes Cooling Cooling type Active Fan diameter 7 cm Fan voltage 12 VNumber of fans 1 fan (s) Security Cable lock slot type Kensington Security algorithms 256-bit AES, FIPS 140-2, HTTPS, SSHCable lock slot Yes Software Mac compatibility Yes Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Linux operating systems supported Yes Operating system version 4.3 Operating system installed QNAP Turbo System Management features On/off switch Yes Web-based management Yes Reset button Yes Management protocols SNMPPower Power consumption (HDD standby)10.56 WPower supply location External Power supply unit (PSU) capacity 60 WFan voltage 12 VAC input voltage 100
- 240 VPower consumption (typical)18.09 WPower consumption (sleep)0.57 WExternal power adapter Yes Weight & dimensions Width 102 mm Depth 219 mm Height 169 mm Weight 1.28kg Package weight 2.32kg Packaging content Number of screws 14 Handheld remote control Yes Quick installation guide Yes External power adapter Yes Cables included AC, LAN (RJ-45) System requirements Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Linux operating systems supported Yes Operational conditions Operating temperature (T-T)0
- 40 &176;COperating relative humidity (H-H)5
- 95% Packaging data Package weight 2.32kg Cables included AC, LAN (RJ-45) Other features Number of simultaneous users 4096 user (s)"\n\n\n\nhttp://objects.icecat.biz/objects/mmo_38324878_1528663186_396_2810.pdf











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Facing the increasing demand for data storage, sharing & multimedia processing, more & more users are looking for a NAS system with good performance & an affordable price tag. The Intel&174; quad-core TS-251+ provides an uncompromising high-performance scalable storage solution for professional users. Powered by the intelligent QTS 4.2 operating system, the TS-251+ performs as an easy-to-use yet powerful NAS for data backup, file synchronization & sharing, remote access & multimedia applications, & is ideal for users to create a secure private cloud to access their data easily.\n\n- Centralize your file storage, sharing & backup with excellent performance\n- Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n- Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n- Enjoy the best audio-visual experience with HDMI output & the free remote control\n- Transcode Full HD videos on-the-fly or offline\n- Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n- Quickly find specific files by real-time, natural search with Qsirch\n- Scale up to 10 drives with QNAP UX-800P expansion enclosure\n\n Quad-core 64-bit Intel&174; Celeron&174; CPU for exceptional performance\n The TS-251+ is powered by a 64-bit Intel&174; Celeron&174; quad-core 2.0 G Hz processor & has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) & dual Gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0 G Hz to 2.42 G Hz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.\n\n QTS 4.2
- Simple & efficient\n Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother & spectacular. Its modern flat design streamlines loading times, & the intelligent desktop means that you can quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, & open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms & geography to bring optimized cloud experiences to you, & incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, & more.\n\n Run additional operating systems on the TS-251+\n The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS & a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, & enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets & import them to the TS-251+ without any complex procedures.\n\n Container Station " LXC & Docker&174; Containers inclusive\n QNAP Container Station exclusively integrates LXC & Docker&174; lightweight virtualization technologies, allowing you to operate multiple isolated Linux&174; systems on the TS-251+ as well as download apps from the built-in Docker Hub&174; Registry. It supports container import/export & permission settings, & features an informative dashboard & flexible user interface for you to manage multiple containers. You can experience the amazing Container Station & enjoy the playground of virtual containers with the TS-251+. Container Station also supports Online Document app, which means that you can directly view, edit & store files of various types anytime on your NAS, including Office documents, images & text files.\n\n Real-time & offline video transcoding\n The TS-251+ delivers superior real-time video transcoding (up to 4K H.264) to convert your videos to formats that can be smoothly played on PCs, mobile devices & Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.\n\n With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also means that you can set a dedicated folder for automatic video transcoding.\n\n Enjoy media freely with multi-zone multimedia control\n Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage & stream photos, music & videos from the TS-251+ to different rooms from a single device using Bluetooth&174;& USB (Universal Serial Bus) devices connected to the TS-251+ (for music streaming only), HDMI, DLNA&174;, Apple TV&174; & Chromecast&132;&162;*. Every room member in different zones can enjoy the convenience & simplicity for media playback & multimedia storage.\n\n Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an i OS&174; device to browse videos/photos & play on the TV via Apple TV&174;, or transform the TS-251+ into a powerful streaming machine with DLNA&174;, Roku&174;, Amazon&174; Fire TV, & Google TV&132;&162; support with the support of Plex Media Server.\n\n Qsirch " A smarter, faster way to search\n Quickly & easily find documents, photos, videos, & music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, & Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.\n\n Cross-platform file sharing, centralized data storage\n The TS-251+ supports SMB/CIFS, NFS, & AFP protocols for file sharing across Windows&174;, Mac&174; & Linux&174;/UNIX&174;. Data, logs & ISO image of CDs & DVDs can be centrally stored in the TS-251+ & protected by an integrated antivirus solution.\n\n File Station integrated with cloud services\n The web-based File Station enables you to easily upload, download, & manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, & smart search for files & folders, the File Station also means that you can easily share files with colleagues & friends via unique URLs, email, & a shared space. What's even better, you can also directly browse & transfer files between the TS-251+ & public cloud services like Google Drive&132;&162;, Dropbox&174;, Microsoft&174; One Drive, Box&174;, Yandex&174; Disk & Amazon&174; Cloud Drive through File Station, & view files with Office Online & Google Docs&132;&162; or directly open them with a Google Chrome&132;&162; office extension.\n\n Well-rounded backup solutions to secure data\n QNAP Net Bak Replicator supports real-time & scheduled data backup on Windows including Outlook email archiving. Apple Time Machine&174; is also supported to provide Mac&174; OS X users with a solution to effortlessly back up data to the TS-251+. The front panel USB (Universal Serial Bus) 3.0 port on the TS-251+ features a one-touch-copy function for you to instantly back up data on external drives to the TS-251+ with just one click, or alternatively to back up data from the TS-251+ to external drives. A wide range of third-party backup software such as Acronis&174; True Image & Symantec&174; Backup Exec are also supported.\n\n Disaster recovery solutions bring peace of mind\n The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time & scheduled data backup to remote QNAP NAS or FTP servers & synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained & for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to & restored from a range of cloud storage services, including Amazon&174; S3, Amazon&174; Glacier, Microsoft&174; Azure&132;&162;, Elephant Drive&174;, Dropbox&174;, Google Drive&132;&162;, Google Cloud Storage&132;&162;, & more.\n\n Volume & LUN snapshot simplifies restoration\n Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage.QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up & restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots per volume or LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, & quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.\n\n Comprehensive security options\n In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, & more. Administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorized access & breach even if the hard drives or the entire system were stolen.\n\n Secure access with VPN Server & VPN Client\n The TS-251+ can be a VPN server with L2TP/IPsec, Open VPN, & PPTP support, allowing you to securely access data shared within the private local network. The TS-251+ also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n\n File synchronization across devices & clouds\n Qsync utility turns your TS-251+ into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files & always have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization & group file sharing, greatly enhancing the flexibility of team projects & collaboration. It also supports centralized configuration, & means that you can remotely erase the Qsync folder on a lost device to avoid data breaches, & even restore it after you have retrieved the device. You can also install the Cloud Drive Sync app from QTS App Center to easily sync files with Google Drive&132;&162; & Dropbox&174; cloud storage.\n\n Comprehensive surveillance solution providing 24/7 security\n The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3, 000 compatible IP camera models, & expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording & playback with a wide range of customizable settings. You can also install the Vmobile app on your i OS&174; or Android&132;&162; devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels & you can expand up to 40 channels by purchasing additional licenses.\n\n Access & enjoy with your mobile devices\n The TS-251+ is your private cloud storage that virtually enlarges the capacity of your smart mobile devices. Qfile means that you can access, upload, download, manage, & share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an i OS&174; device, users can also browse videos & photos stored on the TS-251+ & play on a TV via Apple&174; TV. Qmanager lets you monitor & manage the TS-251+ remotely & efficiently without turning on your PC. You can take & share digital notes with Qnotes, & enjoy & share music, photos & videos on the TS-251+ anywhere & anytime with Qmusic, Qphoto & Qvideo apps.\n\n Install-on-demand apps to extend NAS functionality\n The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP & third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, & much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.\n\n LED indicators with adjustable brightness controls\n With adjustable 3-stage brightness controls for LED indicators, the TS-251+ provides flexible LED brightness options. Based on the surrounding environment, you can adjust the brightness of all system indicators & also schedule the system to automatically dim the LEDs at certain times when needed.\n\n Expand storage capacity easily\n The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on dem&, making the TS-251+ an ideal file center with large storage capacity for storage-intensive business applications.\n\n With the support of QJBOD Express (JBOD enclosures roaming), you can just connect a large capacity QNAP expansion enclosure to the TS-251+, & migrate data to another NAS through the JBOD enclosure without network connectivity.\n\n Energy-saving & eco-friendly\n The TS-251+ utilizes a 22nm CPU & DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, & Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.\n\n Easy-to-use NAS management tools\n\n The TS-251+ provides comprehensive system tools to increase management efficiency.\n\n Administrators can turn on the Turbo NAS via LAN to save energy & improve security.\n\n\n The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet & saves the data, enabling centralized log management with greater efficiency. Feature Feature Value Total installed storage capacity 6 TBStorage drives installed Y Installed storage drive type HDDNumber of storage drives installed 2 Supported storage drive types HDD, SSDNumber of storage drives supported 2 Storage drive capacity 3000 GBRAID support Y Hot-swap drive bays Y Supported storage drive interfaces Serial ATA II, Serial ATA IIIStorage drive sizes supported 2.5, 3.5"RAID levels 0, 1, JBODOnline RAID migration Y Online RAID expansion Y Supported file systems FAT32, HFS+, NTFS, ex FAT, ext 3, ext 4 Bad block scan Y Processor frequency 2 GHz Processor family Intel&174; Celeron&174; Processor cores 4 Internal memory 2 GBInternal memory type DDR3 L Memory clock speed 1600 MHz Maximum RAM supported 8 GBMemory slots 2x SODIMMFlash memory 512 MBEthernet LANYWi-Fi N Ethernet LAN data rates 10, 100, 1000 Mbit/s DHCP client YDHCP server Y Jumbo frames support Yi SCSI support Y Wake-on-LAN ready Y Supported network protocols CIFS/SMB, AFP v 3.3, NFS v 3, FTP, FTPS, SFTP, TFTP, HTTP (S), Telnet, SSH, i SCSI, SNMP, SMTP, SMSCLink aggregation Y Dynamic DNS (DDNS)YEthernet LAN (RJ-45) ports 2USB port YUSB 2.0 ports quantity 2USB 3.0 (3.1 Gen 1) Type-A ports quantity 2HDMI ports quantity 1 Chassis type Tower Cooling type Active Product colour Black Number of fans 1 fan (s) Fan diameter 7 cm LED indicators HDD, LAN, Power, Status, USBCable lock slot Y Cable lock slot type Kensington Type NASDevice class Home & Home Office Backup function Y Backup features Cloud, USB drive, i SCSI LUNBuzzer Y Noise level 15.4 d B Snapshot Y Management protocols SNMPSecurity algorithms 256-bit AES, FIPS 140-2, HTTPS, SSHWeb-based management Y Reset button Y On/off switch Y Built-in i Tunes server Y Built-in FTP server Y Browser supported Apple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox System log YS.M.A.R.T. support Y Share folder 512 Share folder access right management Y Remotely operated Y Backup button Y Universal Plug & Play (UPn P)YOperating system installed QNAP Turbo System Operating system version 4.3 Windows operating systems supported Windows 10, Windows 10 Education, Windows 10 Education x 64, Windows 10 Enterprise, Windows 10 Enterprise x 64, Windows 10 Home, Windows 10 Home x 64, Windows 10 IOT Core, Windows 10 Pro, Windows 10 Pro x 64, Windows 7, Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 7 x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Linux operating systems supported Y Mac compatibility Y Mac operating systems supported Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016 Power supply location External Power supply unit (PSU) capacity 60 WPower consumption (typical)18.09 WPower consumption (sleep)0.57 WPower consumption (HDD standby)10.56 WAC input voltage 100
- 240 VFan voltage 12 VWidth 102 mm Depth 219 mm Height 169 mm Weight 1.28kg Package weight 2.32kg External power adapter Y Cables included AC, LAN (RJ-45) Quick installation guide Y Number of screws 14 Handheld remote control Y Operating temperature (T-T)0
- 40 &176;COperating relative humidity (H-H)5
- 95% Number of simultaneous users 4096 user (s)



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Facing the increasing demand for data storage, sharing & multimedia processing, more & more users are looking for a NAS system with good performance & an affordable price tag. The Intel&174; quad-core TS-251+ provides an uncompromising high-performance scalable storage solution for professional users. Powered by the intelligent QTS 4.2 operating system, the TS-251+ performs as an easy-to-use yet powerful NAS for data backup, file synchronization & sharing, remote access & multimedia applications, & is ideal for users to create a secure private cloud to access their data easily.\n Centralize your file storage, sharing & backup with excellent performance\n Run multiple Windows&174;, Linux&174;, UNIX&174; & Android&132;&162; based virtual machines with the Virtualization Station\n Operate multiple isolated Linux&174; systems as well as download containerized apps with Container Station\n Play 1080p videos with the bundled remote control & multi-channel audio pass-through via HDMI\n Transcode Full HD videos on-the-fly or offline\n Stream multimedia files via DLNA&174;, Air Play&174;, Chromecast&132;&162; & Bluetooth&174; with multi-zone multimedia control\n Quickly find specific files by real-time, natural search with Qsirch\n Scale up to 10 drives with QNAP UX-800P expansion enclosure\n\n Quad-core 64-bit Intel&174; Celeron&174; CPU for exceptional performance\n\n The TS-251+ is powered by a 64-bit Intel&174; Celeron&174; quad-core 2.0 G Hz processor & has 2GB/8GB energy-efficient DDR3L RAM (upgradable to 8GB) & dual Gigabit LAN ports, delivering up to 225 MB/s read & write speeds with port trunking mode. The TS-251+ can also automatically increase the processor's clock rate from 2.0 G Hz to 2.42 G Hz when needed for CPU-intensive tasks. The TS-251+ supports AES 256-bit volume & folder encryption with transfer speeds of up to 205 MB/s, boosting system performance & security while ensuring the safety of sensitive personal data stored in the TS-251+.\n\n QTS 4.2
- Simple & efficient\n\n Thanks to the intuitive user interface of QTS 4.2, your NAS experience is smarter, smoother & spectacular. Its modern flat design streamlines loading times, & the intelligent desktop means that you can quickly find desired functions, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, & open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency. QTS breaks the barriers of devices, platforms & geography to bring optimized cloud experiences to you, & incorporates more advanced features including volume/LUN snapshot, remote connection to public cloud services in File Station, multi-zone multimedia system, & more.\n\n Run additional operating systems on the TS-251+\n\n The Virtualization Station transforms the TS-251+ into a 2-in-a-box NAS that can function as an all-in-one NAS & a virtualization platform that supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, Device Management for centrally managing VM, & enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-251+ with minimal effort. You can also download VMs on demand from online VM markets & import them to the TS-251+ without any complex procedures.\n\n Container Station " LXC & Docker&174; Containers inclusive\n\n QNAP Container Station exclusively integrates LXC & Docker&174; lightweight virtualization technologies, allowing you to operate multiple isolated Linux&174; systems on the TS-251+ as well as download apps from the built-in Docker Hub&174; Registry. It supports container import/export & permission settings, & features an informative dashboard & flexible user interface for you to manage multiple containers. You can experience the amazing Container Station & enjoy the playground of virtual containers with the TS-251+. Container Station also supports Online Document app, which means that you can directly view, edit & store files of various types anytime on your NAS, including Office documents, images & text files.\n\n Use your TS-251+ as a PC with Qv PC Technology\n\n QNAP's exclusive Qv PC Technology consolidates a number of high-end technologies including VM integration, multimedia transcoding, HDMI output, cloud integration & NAS connection technologies, allowing users to operate the TS-251+ as a PC when they plug in a keyboard, mouse & HDMI monitor. With Qv PC Technology, the TS-251+ is transformed into a cost-effective device with PC functionalities for users to directly access stored data, run multiple applications using Windows&174;/ Linux&174;/UNIX&174;/ Android&132;&162; based VMs, surf the web, enjoy Full HD videos with Kodi&132;&162;, monitor surveillance live feeds from IP cameras in real time, & much more.\n\n Enjoy videos on TV via HDMI with bundled remote control\n\n QNAP HD Station integrates the powerful Kodi&132;&162; media player & web browser. With HDMI connectivity, you can connect the TS-251+ to a HDTV to watch your rich multimedia content on the big screen. The splendid user interface & support for 7.1-channel audio passthrough bring smooth playback of 1080p videos. You can even watch You Tube&132;&162; videos, surf the web & manage the TS-251+ using Google Chrome&132;&162; or Mozilla Firefox&174; with multilingual keyboard input. HD Station supports multi-tasking & user authentication so only authorized users can access the stored data via HDMI monitors.\n\n The TS-251+ is packed with the QNAP RM-IR002 remote control for you to conveniently control HD Station via the built-in IR receiver. You can also turn your mobile devices into remote controls by installing the Qremote app. HD Station also supports You Tube Pairing, allowing you to select a You Tube&132;&162; video on your smartphone, tablet or computer & play it on your HDTV via the TS-251+.\n\n Real-time & offline video transcoding\n\n The TS-251+ delivers superior real-time Full HD video transcoding to convert your videos to formats that can be smoothly played on PCs, mobile devices & Smart TVs. It allows for multiple devices to simultaneously view different videos stored on the TS-251+ with on-the-fly hardware accelerated transcoding, saving your time in converting videos to different formats for different devices.\n\n With the benefits of offline transcoding, if you can only connect to an Internet connection with limited/restricted bandwidth, you can still enjoy smooth videos via File Station, Video Station, or the Qfile app by selecting a pre-rendered lower-resolution video, saving system resources of the TS-251+ for other applications. The TS-251+ also means that you can set a dedicated folder for automatic video transcoding.\n\n Enjoy media freely with multi-zone multimedia control\n\n Use your TS-251+ as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage & stream photos, music & videos from the TS-251+ to different rooms from a single device using Bluetooth&174;& USB (Universal Serial Bus) devices connected to the TS-251+ (for music streaming only), HDMI, DLNA&174;, Apple TV&174; & Chromecast&132;&162;. Every room member in different zones can enjoy the convenience & simplicity for media playback & multimedia storage.\n\n Alternatively, to enjoy multimedia yourself, you can choose DLNA-compatible devices, use the Qfile app on an i OS&174; device to browse videos/photos & play on the TV via Apple TV&174;, or transform the TS-251+ into a powerful streaming machine with DLNA&174;, Roku&174;, Amazon&174; Fire TV, & Google TV&132;&162; support with the support of Plex Media Server.\n\n Qsirch " A smarter, faster way to search\n\n Quickly & easily find documents, photos, videos, & music with Qsirch, QNAP's new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including parts of the file name or even words/phrases in the document, & Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you've previously searched for. Qsirch is a huge productivity boost that greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.\n\n Cross-platform file sharing, centralized data storage\n\n The TS-251+ supports SMB/CIFS, NFS, & AFP protocols for file sharing across Windows&174;, Mac&174; & Linux&174;/UNIX&174;. Data, logs & ISO image of CDs & DVDs can be centrally stored in the TS-251+ & protected by an integrated antivirus solution.\n\n File Station integrated with cloud services\n\n The web-based File Station enables you to easily upload, download, & manage files on your TS-251+ wherever there is an internet connection. Supporting file extraction, folder creation, & smart search for files & folders, the File Station also means that you can easily share files with colleagues & friends via unique URLs, email, & a shared space. What's even better, you can also directly browse & transfer files between the TS-251+ & public cloud services like Google Drive&132;&162;, Dropbox&174;, Microsoft&174; One Drive, Box&174;, Yandex&174; Disk & Amazon&174; Cloud Drive through File Station, & view files with Office Online & Google Docs&132;&162; or directly open them with a Google Chrome&132;&162; office extension.\n\n Well-rounded backup solutions to secure data\n\n QNAP Net Bak Replicator supports real-time & scheduled data backup on Windows including Outlook email archiving. Apple Time Machine&174; is also supported to provide Mac&174; OS X users with a solution to effortlessly back up data to the TS-251+. The front panel USB (Universal Serial Bus) 3.0 port on the TS-251+ features a one-touch-copy function for you to instantly back up data on external drives to the TS-251+ with just one click, or alternatively to back up data from the TS-251+ to external drives. A wide range of third-party backup software such as Acronis&174; True Image & Symantec&174; Backup Exec are also supported.\n\n Disaster recovery solutions bring peace of mind\n\n The TS-251+ offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time & scheduled data backup to remote QNAP NAS or FTP servers & synchronizes files to remote folders from local folders with better backup efficiency. You can enjoy backup versioning to preserve a certain amount of versions, with options of simple versioning to schedule how many versions should be retained & for how long, or smart versioning with a rotation scheme that automatically replaces earlier backup versions. The TS-251+ also supports rsync protocol to back up data to remote servers on a scheduled basis. Data can also be backed up to & restored from a range of cloud storage services, including Amazon&174; S3, Amazon&174; Glacier, Microsoft&174; Azure&132;&162;, Elephant Drive&174;, Dropbox&174;, Google Drive&132;&162;, Google Cloud Storage&132;&162;, & more.\n\n Volume & LUN snapshot simplifies restoration\n\n Not limited to high-end models, the TS-251+ brings the highly-anticipated snapshot function for your flexible usage.QTS Storage Manager adds an easy-to-use web-based snapshot tool for you to easily back up & restore data on the TS-251+ back to any point of time to prevent loss of important data. You can take up to 256 snapshots per volume or LUN, efficiently replicate volume/LUN snapshots to remote servers by copying only the changes made, & quickly clone a volume /LUN snapshot as a local volume without interrupting the current system operation. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even when the file is opened.\n\n Comprehensive security options\n\n In open network environments, data on the connected devices may be exposed in a potential hack. The TS-251+ provides numerous security options, such as 2-step verification, encrypted access, IP blocking, & more. Administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-251+ is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive data from unauthorized access & breach even if the hard drives or the entire system were stolen.\n\n Secure access with VPN Server & VPN Client\n\n The TS-251+ can be a VPN server with L2TP/IPsec, Open VPN, & PPTP support, allowing you to securely access data shared within the private local network. The TS-251+ also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission.\n\n File synchronization across devices & clouds\n\n Qsync utility turns your TS-251+ into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251+ will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files & always have the most up-to-date files on different devices. Qsync provides multiple ways of file synchronization & group file sharing, greatly enhancing the flexibility of team projects & collaboration. It also supports centralized configuration, & means that you can remotely erase the Qsync folder on a lost device to avoid data breaches, & even restore it after you have retrieved the device. You can also install the Cloud Drive Sync app from QTS App Center to easily sync files with Google Drive&132;&162; & Dropbox&174; cloud storage.\n\n Comprehensive surveillance solution providing 24/7 security\n\n The TS-251+'s Surveillance Station offers a professional surveillance solution with a user-friendly management interface, a wide range of over 3, 000 compatible IP camera models, & expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording & playback with a wide range of customizable settings. You can also install the Vmobile app on your i OS&174; or Android&132;&162; devices to manage the monitoring of cameras anytime, anywhere, to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-251+. The TS-251+ offers 2 free IP camera channels & you can expand up to 40 channels by purchasing additional licenses.\n\n Access & enjoy with your mobile devices\n\n The TS-251+ is your private cloud storage that virtually enlarges the capacity of your smart mobile devices. Qfile means that you can access, upload, download, manage, & share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an i OS&174; device, users can also browse videos & photos stored on the TS-251+ & play on a TV via Apple&174; TV. Qmanager lets you monitor & manage the TS-251+ remotely & efficiently without turning on your PC. You can take & share digital notes with Qnotes, & enjoy & share music, photos & videos on the TS-251+ anywhere & anytime with Qmusic, Qphoto & Qvideo apps.\n\n Install-on-demand apps to extend NAS functionality\n\n The TS-251+ has a built-in App Center that provides various install-on-demand apps developed by QNAP & third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, & much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP's development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-251+.\n\n Expand storage capacity easily\n\n The TS-251+ supports online capacity expansion for archiving rapidly growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on dem&, making the TS-251+ an ideal file center with large storage capacity for storage-intensive business applications.\n\n With the support of QJBOD Express (JBOD enclosures roaming), you can just connect a large capacity QNAP expansion enclosure to the TS-251+, & migrate data to another NAS through the JBOD enclosure without network connectivity.\n\n Energy-saving & eco-friendly\n\n The TS-251+ utilizes a 22nm CPU & DDR3L RAM which feature low voltage, low power consumption, maintaining high performance in system operations with the benefit of energy-saving. Other eco-friendly designs include S3 sleep mode, HDD standby, scheduled power on/off, hard disk standby mode, & Wake on LAN. QNAP also packs the TS-251+ in an eco-friendly box to minimize the environmental impact.\n\n Easy-to-use NAS management tools\n The TS-251+ provides comprehensive system tools to increase management efficiency.\n- Administrators can turn on the Turbo NAS via LAN to save energy & improve security.\n- The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet & saves the data, enabling centralized log management with greater efficiency.\n\n Additional features\n The TS-251+ supports various applications for home offices as an all-in-one Turbo NAS with cost-efficiency.\n\n- The Turbo NAS supports RADIUS server which provides centralized authorization management for computers to connect & use a network service.\n- QTS also supports VPN Client for PPTP & Open VPN to protect your privacy during data transmission. Feature Feature Value Total installed storage capacity 8 TBStorage drives installed Y Installed storage drive type HDDNumber of storage drives installed 2 Supported storage drive types HDD, SSDNumber of storage drives supported 2 Storage drive interface Serial ATA II, Serial ATA IIIStorage drive capacity 4000 GBStorage drive size 2.5/3.5"RAID support Y Hot-swap drive bays YRAID levels 0, 1 Supported file systems FAT32, HFS+, NTFS, ext 3, ext 4 Processor frequency 2 GHz Processor family Intel&174; Celeron&174; Processor cores 4 Internal memory 2 GBInternal memory type DDR3 L Maximum RAM supported 8 GBMemory slots 2 Flash memory 512 MBEthernet LANYWi-Fi N Ethernet LAN data rates 10, 100, 1000 Mbit/s DHCP client YDHCP server Yi SCSI support Y Wake-on-LAN ready Y Ethernet LAN (RJ-45) ports 2USB 2.0 ports quantity 2USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity 2HDMI ports quantity 1 Chassis type Tower Cooling type Active Product colour Black, Grey Number of fans 1 fan (s) Fan diameter 7 cm LED indicators HDD, LAN, Power, Status, USBCable lock slot Y Cable lock slot type Kensington Type NASDevice class Home & Home Office Backup function Y Buzzer Y Multilingual support Y Access Control List (ACL)YWeb-based management Y Reset button Y On/off switch Y Built-in i Tunes server Y Built-in FTP server Y Operating system installed QNAP Turbo System Operating system version 4.2 Windows operating systems supported Windows 7 Enterprise, Windows 7 Enterprise x 64, Windows 7 Home Basic, Windows 7 Home Basic x 64, Windows 7 Home Premium, Windows 7 Home Premium x 64, Windows 7 Professional, Windows 7 Professional x 64, Windows 7 Starter, Windows 7 Starter x 64, Windows 7 Ultimate, Windows 7 Ultimate x 64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x 64, Windows 8 Pro, Windows 8 Pro x 64, Windows 8 x 64 Linux operating systems supported Y Mac operating systems supported Mac OS X 10.0 Cheetah, Mac OS X 10.1 Puma, Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.2 Jaguar, Mac OS X 10.3 Panther, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks Server operating systems supported Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2 Power supply location External Power supply unit (PSU) capacity 60 WAC input voltage 100-240 VFan voltage 12 VWidth 102 mm Depth 225 mm Height 168.8 mm External power adapter Y Cables included AC, LAN (RJ-45) Quick installation guide Y Operating temperature (T-T)0
- 40 &176;COperating relative humidity (H-H)5
- 95%


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