Acomdata E5 External Hard Drive. Hard drive capacity: 320 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: USB 2.0. Colour of product: Grey. Power consumption (typical): 40 W. Weight: 1090 g, Width: 117 mm, Depth: 206.5 mm. Operating temperature range (T-T): 5 - 55 °C, Operating relative humidity range: 8 - 90 %