Rocstor Arcticroc 2T 4TB USB 2.0/eSATA/FW400/FW800 Dual Bay Raid Tower System for Pc and Mac Provides flexible connections including eSATA, USB 2.0, 1394b and 1394a ports Hard Drives are hot-pluggable Simplifies HDD installation use permits or allows effortless HDD hot-swapping Configures RAID modes via mode switch: no IT expertise required Simplifies RAID management: no software installation required Allows hardware RAID mode settings for effective storage management Product dimensions: 8.4 Length x 5.0 Depth x 5.4 Width