Verbatim PowerBay Quad Drive Raid 3.5" 4-Bay USB 2.0/eSATA/Dual FireWire 800 External SATA HDD Enclosure 4-Bay RAID Multi-Interface Drive. Each bay supports a hard drive with up to 2 Terabyte capacity (8 TB maximum total). Fully enclosed, hot-swappable hard drive cartridge system. Multiple interfaces for fast data transfer: USB 2.0 port for wide compatibility. RAID 0, RAID 5 and RAID 10 (0+1) modes for data protection and redundancy.