Lenovo ThinkPad 2TB Secure Portable Hard Drive with USB 3.0: With its slim, lightweight, self-powered, and user-friendly design, the ThinkPad USB 3.0 500 GB Secure Hard Drive offers high-level, 256-bit Advanced Encryption Standard (AES) security, making it ideal for protecting important data while on the go. With a built-in, premium, metal, dome switch keypad