Get reliable always-on network storage with the TeraStation 3020 4TB 2-Bay NAS Server from Buffalo. Two 2TB SATA III hard drives provide a total storage capacity of 4TB and are optimized for reliable 24/7 operation. Connect to networks via two RJ45 ports supporting Gigabit and 2.5 Gigabit Ethernet. Supporting RAID 0, 1, and JBOD modes, this NAS server allows for easy hot swapping of drives, too.