The TS-251A provides the innovative USB (Universal Serial Bus) 3.0 Quick Access port that means that you can quickly complete the first-time NAS installation & to then directly access files & data stored on the NAS. It also supports two additional transmission modes: Ethernet NAS mode & i SCSI SAN block-based mode. Combining USB (Universal Serial Bus) Quick Access, NAS & i SCSI-SAN into one box, the TS-251A is a powerful but easy-to-use storage solution ideal for backup, synchronization, remote access, & entertainment. It greatly helps to boost productivity & can meet the demands of photographers & audiovisual enthusiasts for direct, quick access to files. The TS-251A is powered by an upgradable & high-performance 14nm Intel Celeron N3060 dual-core 1.6 G Hz processor, & supports 4K video playback & transcoding. Pre-installed with 4GB DDR3L (2 x 2GB) RAM Excellent system performance, ideal for centralized management, file sharing & backup USB (Universal Serial Bus) Quick Access port for accessing files without needing a network connection Supports 4K hardware decoding & transcodes 4K H.264 videos on-the-fly or offline Enjoy the best audio-visual experience with HDMI output, multi-channel surround sound & the free remote control Build a personal karaoke system with Ocean KTV Linux Station supports Ubuntu with direct output via HDMI A hybrid approach to virtualization: Virtualization Station & Container Station Supports Virtual JBOD (VJBOD) to maximize the storage utilization of multiple QNAP NAS units