The 352UN with 3TB HDD is unique external hard drive that can make up to 2 hard disks with SATA interfaces available for external storage via USB or on the LAN using NDAS. ;It is compact, sturdy, easy to setup and provides several advantages for the small network or home user that are not possible with more expensive servers. ;Windows users can assemble the drives in RAID configurations, via the network to create a large disk or to maintain a mirror image of all the data in real time.;Network and USB connections are possible from Windows, MAC and Linux computers and multiple Windows based computers can share write access on the LAN.