|The world's best-selling external hard drive now features a new, smart, visual backup solution that protects your data automatically. My Book offers complete backup options with WD SmartWare Pro software for local and cloud backup and Acronis True Image WD Edition software for system level backup. Gain peace of mind knowing that your data is protected from unauthorized access with password protection and hardware encryption. Shipped formatted for Windows (Windows XP, Windows Vista, Windows 7, Windows 8). Compatible with Mac OS X 10.6.5 or later (requires reformatting). Includes: USB 3.0 cable and AC adapter.