Seagate 500GB, Expansion. Hard drive capacity: 500 GB, Hard drive size: 63.5 mm (2.5 "), Hard drive interface: USB 3.0. Weight: 160 g, Height: 15.5 mm, Width: 81.1 mm. Package dimensions (WxDxH): 89.1 x 128.10 x 22 mm, Package weight: 270 g This is an auto-generated long summary based on the first three features of the first five feature groups.