Seagate Backup Plus 4TB Portable External Hard Drive with 200GB of Cloud Storage & Mobile Device Backup USB 3.0 Model STDR4000900 (Silver) Form Factor: 2.5 Dimensions: 0.81 x 3.07 x 4.51 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