Seagate 500GB Backup Plus Portable Mac. Hard drive capacity: 500 GB, Hard drive rotational speed: Variable, Hard drive interface: USB 2.0. Data transfer rate: 480 Mbit/s, USB data transfer rates: 480 Mbit/s. Colour of product: Silver. Weight: 224 g, Width: 81.1 mm, Depth: 123.4 mm. Cables included: USB