WD 4TB My Book Desktop External Hard Drive, USB 3.0 - WDBBGB0040HBK-NESN

Massive capacity, up to 18TB capacity (1 1TB = one trillion bytes. Actual user capacity may be less depending on operating environment.) Includes software for device management and backup with password protection (Download and installation required. Terms and conditions apply. User account registration may be required.) 256-bit AES hardware encryption SuperSpeed USB (5 Gbps); USB 2.0 compatible