The compact design offers up to 10TB capacity, making WD Elements desktop storage the ideal solution for easy, add-on storage of all your important photos, music, videos and files. When your internal hard drive is almost full your PC slows down. Don't delete files. Free up space on your internal hard drive by transferring files to your WD Elements desktop storage and get your computer moving again. Works right out of the box with Windows PC. Just plug into the USB port to instantly add storage. With this single drive you get compatibility with the latest USB 3.0 devices and backward compatibility with USB 2.0 devices as well. We know your data is important to you. So we build the drive inside to our demanding requirements for durability, shock tolerance, and long-term reliability. Then we protect the drive with a durable enclosure designed for style and protection. Formatted NTFS and compatible with Windows 10, Windows 8.1 or Windows 7. Compatibility may vary depending on user's hardware configuration and operating system.