Sans Digital RAID Enclosures(MS1UTP) External I/O: USB 3.0 & eSATA 3.5" Drive Bays: 1 x Hot-Swappable Power Supply: Dual 12V & 5V DC Adaptor Form Factor: Single Bay Enclosure Maximum Capacity: 3TB Status Indicators: Front Indicator LED USB 3.0 backward compatible with USB 2.0 Portable external storage with a removable tray.