Maxtor OneTouch III Mini External 100GB USB 2.0 Hard Drive R01E100 100 GB portable hard drive connects to your computer via USB Lightweight, portable storage provides a simple way to backup, sync, and secure your files on the go User interface for drive management, security, and automated backup schedule is simple and intuitive Includes portable drive, USB cable, and user manual System Rollback feature rolls back your system to a better point in time, such as before a virus attack, while keeping your data current