Buslink CipherShield 256-bit RAID Hard Drive - 4 x HDD Supported - 4 x HDD Installed - 40 TB Installed HDD Capacity - Serial ATA/300 Controller - RAID Supported 0, 3, 5, 10, LARGE - 4 x Total Bays - 4 x 3.5" Bay - eSATA - 1 USB Port(s) - 1 USB 3.0 Port(s) - Desktop: