Seagate 4TB Expansion Portable External Hard Drive USB 3.0 Model STEA4000400 Black Form Factor: 2.5 Dimensions: 0.82 x 3.15 x 4.61 Weight: 0.52 lb. Package Contents: Seagate Expansion drive x0D x0A18-inch (45.72cm) USB 3.0 cable x0D x0AQuick start guide Electrical Outlet Plug Type: Hard Drive