Buffalo DriveStation - External Hard Drive - 320GB. Hard drive capacity: 320 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: Serial ATA. Colour of product: Black, Grey. Power consumption (typical): 25 W. Weight: 1300 g. Operating temperature range (T-T): 0 - 35 °C, Operating relative humidity range: 20 - 80 %