Maxtor OneTouch 4 Mini 160 GB USB 2.0 Portable External Hard Drive STM901603OTA3E1-RK Ideal backup and storage for carrying your digital portfolio with you Simple Maxtor user interface for drive management, security, and backup scheduling Two levels of security against unauthorized use  Maxtor DrivePass and encryption Maxtor SafetyDrill prepares/boots/recovers your PC's entire internal drive contents during system failure or virus/spyware infection (Windows only) Customizable Maxtor OneTouch button, USB powered; PC and Mac compatible