Aluratek Tornado plus 2.5", 320GB. Hard drive capacity: 320 GB, Hard drive rotational speed: 5400 RPM, Hard drive interface: USB 2.0. Colour of product: Black. LED indicators: Blue. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 10 - 85 %. Minimum system requirements: USB port