Buffalo  MiniStation DataVault Portable  320GB Hard Drive USB 2.0 with Full Disk Encryption HDS-PH320U2(Black) Automatic data encrytion in hardware for PC and Mac Improved Cable Management TurboUSB Increases Your Data Transfer Speeds Hardware Encryption with 128-bit AES 0.9 x 5.2 x 3.3 inches ; 7.8 ounces