Cirago CDD2000 Hard Drive Docking Station is a SuperSpeed USB 3.0 Backwards compatible with USB 2.0 and 1.1 that support SATA I/II 2.5-inch and or 3.5-inch hard disk drives. The Cirago is a High Performance Transfers up to 5 Gbps, plug and play, hot-swappable.The Cirago CDD2000 Hard Drive Docking Station is a simple and convenient must-have product for anyone that has spare hard drives lying around. It provides an easy solution for swapping or adding hard drives to your computer and without the inconvenience of opening up your computer or buying several hard drive enclosures.