Western Digital My Book Studio 3TB. Hard drive capacity: 3000 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: USB 2.0, FireWire 400, FireWire 800. USB data transfer rates: 480 Mbit/s, FireWire data transfer rates: 400, 800 Mbit/s. Colour of product: Aluminium. Windows operating systems supported: Windows XP, Windows Vista, Windows 7, Mac operating systems supported: Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard. Weight: 1180 g, Width: 48 mm, Depth: 135 mm