The EN2 external USB/eSATA hard drive provides the fastest way to add more storage! External SATA provides the fastest data transfer rate of any external drive! The drive is compatible with PCs and MACs (laptops or desktops) and is powered using the included USB cable, eliminating the need for a power adapter! The solid, stylish black enclosure is manufactured using thick aluminum metal alloy, which assists in dissipating heat and provides excellent protection. The included software eliminates the need to push a button or click an icon to activate a backup. The software can operate automatically in the background saving your files to the drive while you work! Everything you need to backup your data is in the box!