Western Digital WD ELEMENTS PORTABLE 4TB BLACK Fast transfer rates. - When connected to a USB 3.0 port, WD Elements portable storage delivers maximum performance for data transfers. Transfer a full-length HD movie in a fraction of the time it takes with USB 2.0. Performance may vary based on user's hardware and system configuration. USB 3.0 and USB 2.0 compatibility - Works seamlessly with the latest USB 3.0 devices and is backward compatible with USB 2.0 devices as well. High capacity in a small enclosure - The small, lightweight design offers high-capacity storage, making WD Elements portable storage the ideal companion for consumers who want to take their important files with them. Improve PC performance - When your internal drive is almost full your PC slows down. Don't delete files. Free up space on your internal drive by transferring files to your WD Elements and get your PC moving again. - WD quality inside and out. 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 for Windows Formatted NTFS and compatible with Windows 10 and 8.1. Reformatting required for other operating systems. Depth: 111 MM Big capacity in a small device. With up to 5TB in a lightweight design, you can take your photos, videos, music and other files wherever you go. Improve PC performance. Free up space on your slow-moving PC by transferring files to your WD Elements drive, and get your PC moving again. USB 3.0/2.0 compatible. With USB 3.0 connectivity, you get maximum performance when tranferring your files to and from WD Elements portable drive. Works right out of the box with Windows PC. Just plug into the USB port to instantly add storage. USB 3.0 Type-A Formatted NTFS for Windows 10, 8.1 and 7. Reformatting may be required for other operating systems Box contents: External hard drive, USB cable, AC adapter, Quick Install Guide Height: 21 MM Width: 82 MM