Iomega 320GB Hi-Speed USB 2.0. Hard drive capacity: 320 GB, Hard drive rotational speed: 5400 RPM, Hard drive size: 63.5 mm (2.5 "). Colour of product: Silver. Weight: 170 g, Width: 74.4 mm, Depth: 128.9 mm. Data transfer rate (max): 480 Mbit/s, Minimum processor: Pentium II, G3, Minimum RAM: 256 MB