Hitachi Touro Desk Pro. Hard drive capacity: 3000 GB, Hard drive interface: USB 3.0, Hard drive size: 88.9 mm (3.5 "). USB data transfer rates: 480, 5000 Mbit/s. Colour of product: Black. Windows operating systems supported: Windows XP, Windows Vista, Windows 7, Mac operating systems supported: Mac OS X 10.5 Leopard. Weight: 970 g, Width: 129 mm, Depth: 60 mm