Keep archived data at your fingertips with this 6. 7-inch portable hard drive. It uses USB 3. 0 connectivity for faster data transfer and is compatible with Mac or Windows out of the box. This WD My Book external drive comes with 256-bit encryption, ensuring that documents are protected from intrusion. 256-bit encryption protects your PC from hackers and thieves by encoding all your data. Desktop drive in black features 8TB storage capacity and PC and Mac compatibility. 3-year manufacturer limited warranty. Includes security and backup software for easy setup. Dimensions: 6. 7″H x 1. 9″W x 5. 5″D. Powered for use with an external power supply. Uses USB 3. 0 for ultra-fast data transfer and works with USB 2. 0 ports on older machines. Has a password-protected design for extra data security. Secure music and video files with this WD My Book 8TB external hard drive.