Hitachi Touro Mobile 320 GB. Hard drive capacity: 320 GB, Hard drive rotational speed: 5400 RPM, Hard drive interface: Serial ATA. USB data transfer rates: 12, 480 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, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion. Width: 80 mm, Depth: 15 mm, Height: 126 mm