The Western Digital 1TB My Passport Hard Drive can be used to free-up the memory space in your computer system. This external hard drive provides a plug-and-play operation with Windows systems. You can use the hard drive with a Mac OS system after reformatting it. The USB 3.0 port is backward compatible with to USB 2.0 supported devices. This external hard drive comes with WD Security software that allows you to give a 256-bit AES hardware encrypted password to the stored data. The preloaded WD Backup software can be used to scheduled to take backups at specific time intervals. As the hard drive runs on USB-bus power, it doesn't require any external power cord.