The world's most popular portable drive is now smaller than ever. And it's smarter than ever with automatic, continuous backup software and password protection. Our smallest portable drive ever - We're experts in portable storage, so we designed a smaller, high-quality, integrated USB hard drive inside a stylish package. With a variety of fun colors, there's sure to be one to suit your style. WD SmartWare - See your life safe in one place. * See your backup as it happens - Seeing is believing. Visual backup displays your content in categories and show the progress of your backup. * Protect your data automatically - Relax, your data is secure. Automatic, continuous backup will instantly make a second copy whenever you add or change a file. * Bring back lost files effortlessly - Retrieve your valuable data to its original location whether you've lost all your data or just overwritten an important file. * Take control - Customize your backup, set drive security, run diagnostics, manage the power settings, and more from the WD SmartWare control center. Drive lock - Gain peace of mind knowing that your data is protected from unauthorized access or theft with password protection and 256-bit hardware-based encryption. Planet friendly - We designed a small box from recycled materials to minimize waste. We encourage you to recycle it. WD My Passport Essential Robot Box Ideal for * Protecting your data with automatic, continuous backup * Retrieving lost data effortlessly * Adding extra storage space for photos, videos and music * Securing private or sensitive data What's in the box Ultra-portable hard drive, WD SmartWare software, USB cable, Quick Install Guide. Compatibility Formatted NTFS Windows® XP, Windows Vista®, Windows 7 Mac OS® X Tiger®, Leopard®, Snow LeopardTM (requires reformatting) Note: Compatibility may vary depending on user's hardware configuration and operating system.