Appearance Dimensions -1TB / 2TB: 131.8 mm x 80.8 mm x 16.3 mm (5.19" x 3.18" x 0.64") -4TB: 131.8 mm x 80.8 mm x 24.5 mm (5.19" x 3.18" x 0.96") Weight: -1TB / 2TB: 191 g (6.74 oz) -4TB: 298 g (10.51 oz) Color: Navy blue/Purple 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