Appearance Dimensions: -1TB/2TB: 129.5 mm x 80.8 mm x 16.1 mm (5.10" x 3.18" x 0.63") -4TB: 129.5 mm x 80.8 mm x 24.1 mm (5.10" x 3.18" x 0.95") Weight: -1TB/2TB: 185 g (6.53 oz) -4TB: 294 g (10.37 oz) Color: Iron gray/Military green Interface USB Type: micro USB to USB Type A Connection Interface: USB 3.1 Gen 1 (USB 5Gbps) Storage Capacity: 1 TB/2 TB/4 TB Storage Media: 2.5" HDD