Product description This device is a trusted desktop storage unit designed to complement your personal style with a massive amount of space to store all your photos, videos, music and documents. Equipped with password protection, the My Book drive helps keep your files safe. This is a complete backup system equipped with WD Backup software for Windows and Apple Time Machine compatibility for Mac. Auto backup with included WD Backup software and Time Machine compatibility Password protection with hardware encryption Reimagined design.Trusted drive built with WD reliability Operating System: Windows 10, Windows 8, Windows 7, Mac OS X El Capitan, Yosemite or Mavericks. May require reformatting for other operating systems. USB 3.0 port; USB 2.0 compatible