Iomega eGo Encrypt Portable Hard Drive 320GB. Hard drive capacity: 320 GB, Hard drive rotational speed: 5400 RPM, Hard drive interface: USB 2.0. Weight: 0.268 g, Width: 89 mm, Depth: 143 mm. Data transfer rate (max): 480 Mbit/s, Minimum processor: 300 MHz, Minimum RAM: 256 MB