The My Book external hard drive is trusted desktop storage designed to complement your personal style with a massive amount of space to store your photos, videos, music and documents. Equipped with password protection and perfectly paired with WD Backup or Apple Time Machine, My Book desktop storage helps keep your files safe.
WD My Book 4TB Desktop External Hard Drive:

 
  
Auto backup with included WD Backup software and Time Machine compatibility
  
Password protection with hardware encryption
  
Trusted storage built with WD reliability
  
USB 3.0 port; USB 2.0 compatible
  
3-year limited warranty