Iomega HDD 250GB USB2 7200rpm 3 5" silver. Hard drive capacity: 250 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: USB 2.0. Weight: 1295 g. Hard disk transfer rate: 480 Mbit/s, Minimum system requirements: 4X CD-ROM 65 MB hard drive space PC: 300 MHz or higher with certified USB controller