Lenovo 2TB ThinkPad USB 3.0 Secure Portable Hard Drive: Optimized for safeguarding essential data while on-the-go, the ThinkPad USB 3.0 500 GB Secure Hard Drive offers high-level, 256-bit Advanced Encryption Standard (AES) security within a slim, lightweight, self-powered, easy-to-use design. Featuring an integrated, high-quality, metal, dome switch keyp