HGST Z5K500 320GB, Travelstar. Hard drive capacity: 320 GB, Hard drive interface: Serial ATA, Hard drive speed: 5400 RPM. Width: 27.6" (700 mm), Height: 0.276" (7 mm), Depth: 3.94" (100 mm). Hard disk transfer rate: 1087 Mbit/s, Color of product: Metallic