Western Digital My Book 4TB  – USB 3.0 [WDBBGB0040HBK-EESN] Overview TRUSTED AND LOVED HIGH-CAPACITY STORAGE. REIMAGINED DESIGN. Compact outside. Powerful inside. Store massive amounts of photos, videos, music and documents with My Book desktop storage. Complete Backup Equipped with WD Backup software for Windows and Apple Time Machine compatibility for Mac, the My Book desktop hard drive can back up your photos, videos, music and documents. The My Book desktop hard drive also works great with Acronis® True Image™ WD Edition software to schedule full system backups. Password Protection With built-in 256-bit AES Hardware Encryption with WD Security software, just set your own personalized password to help keep your content private and safe. WD Reliability Millions of people around the world trust their data to My Book desktop storage. REIMAGINED DESIGN Surprisingly compact, the design of My Book desktop storage exudes a confidence reflective of its reliability. With up to 8TB of storage capacity, you can trust My Book to be the home of your digital life. EASY TO USE Ready to use out of the box, start transferring files, saving memories and backing up right away. WD Backup and WD Security software are included to help protect your data. My Book desktop storage is also compatible with Apple Time Machine. TECHNICAL SPECIFICATIONS Formatted exFAT for out-of-the-box compatibility with Windows and Mac. Operating System: Windows® 10, Windows 8.1 or Windows 7 operating systems. MacOS® High Sierra, Sierra (10.12), El Capitan (10.11) operating systems. Compatibility may vary depending on user’s hardware configuration and operating systems and requires reformatting for Time Machine. Capacity 4TB Interface USB 3.0 / USB 2.0 compatible Additional Details # Auto backup with included WD Backup software and Time Machine-compatible # Password protection with hardware encryption Package Includes # My Book External Hard Drive # USB 3.0 cable # AC adapter # For Windows: WD Discovery™ software for WD Backup™, WD Security™ and WD Drives        Utilities™ # For Mac: WD Discovery™ software for WD Security™ and WD Drive Utilities™ # Quick install guide WATCH THE POWER OF MY BOOK COME TO LIFE ​We live hectic lives and generate tons of digital content. My Book desktop storage has massive storage capacity so you can confidently back up the files that make up your digital life. For More Info. Click Here For More Western Digital Product Click Here