LaCie 1TB d2 Quadra Hard Disk. Hard drive capacity: 1000 GB, Hard drive rotational speed: 5400 RPM, Hard drive interface: eSATA, FireWire 400, FireWire 800, USB 2.0. Data transfer rate: 3000 Mbit/s, USB data transfer rates: 480 Mbit/s, FireWire data transfer rates: 400, 800 Mbit/s. Colour of product: Aluminium. Mac operating systems supported: Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion. Weight: 1.5 kg, Width: 44 mm, Depth: 173 mm