The Rosewill RX35-AT-SU3 SLV external enclosure is designed to convert 3.5 SATA I/II HDD to external USB storage drive for more convenient data transfer. With a light and small design, the Rosewill RX35-AT-SU3 SLV features green power management for power saving and prolonged HDD life cycle. It also boasts aluminum casing & SuperSpeed USB 3.0 connection. Quickly store and backup your data. This is a perfect 3.5 enclosure for you.