"Designed with the same commitment to quality that made WD external drives the number one selling drives in the world. Designed for use with Windows-based computers. Can be easily reformatted for use with Macs. Just connect the power and plug it into a USB port to instantly add more storage to your computer. Packaged in a minimized eco-friendly, recyclable packaging made from recycled materials. Turns on and off with your computer. Enters idle mode when not in use. Utilizes a WD drive with power-saving WD GreenPower Technology and an EnergyStar compliant power supplyWd quality inside and outPreformatted for pcsPlug-and-play simplicityEarth-friendly packagingDesigned to save powerMac and Windows Compatibility"