Seagate 4TB Backup Plus Portable External Hard Drive USB 3.0 Model STDR4000902 Red Form Factor: 2.5 Dimensions: 4.51 x 3.07 x 0.81 Weight: 0.54 lb. Package Contents: Seagate Backup Plus portable drive 18 (45.72cm) USB 3.0 cable NTFS driver for Mac 3 Quick start guide