Western Digital My Book Essential 2TB USB 3.0 External Hard Drive: * Visual backup displays your content in categories and shows the progress of your backup * Automatic, continuous backup instantly makes a second copy whenever you add or change a file * Bring back lost files whether you"ve lost all your data or just overwritten an important file * WD SmartWare Control Center lets you customize your backup, set drive security, run diagnostics and more * Drive Lock protects your data from unauthorized access with password protection and 256-bit encryption * Illuminated Capacity Gauge lets you see at a glance how much space is available on your Western Digital 2TB desktop hard drive * USB 2.0 Interface offers convenience and compatibility among multiple computers * WD GreenPower Technology lowers internal drive power consumption of the Western Digital 2TB desktop hard drive by up to 30 percent * Plug and play compatibility with Windows PCs