My Book Essential 2.0 Edition 640GB Hard Drive
Western Digital My Book Essential 640GB, 640 GB, 3.5", 2.0, 7200 RPM, Black
Western Digital My Book Essential 640GB. Hard drive capacity: 640 GB, Hard drive size: 3.5". USB version: 2.0. Hard drive rotational speed: 7200 RPM. Product colour: Black