MicroStorage 500GB 3.5" 7.2k SATA Hotswap. Hard drive capacity: 500 GB, Hard drive size: 88.9 mm (3.5 "), Hard drive rotational speed: 7200 RPM. Operating temperature range (T-T): 5 - 60 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 5 - 90 %