The QNAP TS-421U Turbo NAS is an all-in-one rack mount network attached storage (NAS) server optimized for small & medium businesses looking for an affordable yet high performance network storage solution. The TS-421U can hold up to 4 hard drives & is designed to be easily installed in the server room & configured with up to 12TB of storage capacity. The TS-421U is an ideal solution for centralized data backup, cross-platform file sharing, i SCSI/IP-SAN storage combo solution & a number of business applications. Moreover, the TS-421U offers exceptionally low power consumption, reliable system operations & capacity expandability. Key Features Large Capacity Storage & File Sharing Backup Center for Business NAS, i SCSI/ IP-SAN Storage Combo Solution for Server Virtualization i SCSI & Virtualization Deployment Feature-rich Business Applications