Seagate 4TB Backup Plus. Hard drive capacity: 4000 GB, Hard drive rotational speed: Variable, Hard drive interface: USB 3.0. Data transfer rate: 5000 Mbit/s, USB data transfer rates: 5000 Mbit/s. Colour of product: Black. Weight: 1080 g, Width: 124 mm, Depth: 158 mm. Cables included: USB