Iomega 500 GB 3.5" USB 2.0 Hard Drive. Hard drive capacity: 500 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: USB 2.0. Weight: 1260 g, Width: 121 mm, Depth: 222 mm. Hard disk transfer rate: 480 Mbit/s, Minimum processor: Pentium II / G3, Minimum system requirements: Microsoft Internet Explorer 5.0/Netscape 6.1