"Optimized for safeguarding essential data while on-the-go, the ThinkPad USB 3.0 2TB 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 keypad for entering an 8- to 16-digit password for 1 administrator ID and 1 additional user ID, if desired. Connectivity is provided via either the USB 2.0, USB 3.0 port or built-in USB 3.0 cable with an integral storage slot. The ThinkPad 3.0 2TB secure HD comes with a USB-Y extension cable to ensure adequate power without the need for an AC power adapter, and an attractive protective carrying case. " Data Transfer Speed: USB 2.0 - Reads up to 33 MBps, Writes up to 25 MBps, USB 3.0 - Reads up to 75 MBps, Writes up to 55 MBps Black O/B