Vantec NexStar HDD Duplicator(VANTEC NST-DP100S3 HDD DUP)- HD Capacity: 10TB per bay, total capacity of 20TB with two drives, Internal Interface: SATA, External Interface: USB 3.0 (Backawards Compatible with USB 2.0&1.1), Power Supply: AC Adapter, 12VDC, 3A, Connectivity: USB Cable Length: 914 mm (36 inches), OS Support: Microsoft Windows XP/Vista/7/8/8.1/10; Mac OS X v10.6 and Up