Description Specifications: Dual Bay HDD’s each Bay Support 2.5″ / 3.5″ Two HDD’s Can Be Inserted Simultaneously One Touch Copy Button from A HDD Bay to B HDD bay Support 2.5″ & 3.5″ HDD’s SATA SATAII SATAIII Support Up To 6TB HDD’s Complaint With USB3.0 Rev. 1.0 Complaint With USB2.0 Standard Support the Following Speed Data rate: Low Speed (1.5Mbps) / Full Speed (12Mbps) High Speed (480Mbps) / Super Speed (5Gbps) Compatible with USB Mass Storage Class Rev. 1.3 Compatible with SATA Rev. 2.6 Specification Compatible with Windows XP Vista 7 8 10 Mac 10.5+