WD My Passport 4TB portable HDD Gray

Automatic backupWD's automatic, continuous backup software works quietly in the background to help protect your data using minimal PC resources. Whenever you add or change a file, it's instantly backed up.High capacity, small designOffering high capacity in a compact drive, My Passport is the ideal companion for anyone with lots of videos, photos, music, and files that they want to help protect and take on the road.Password protection secures your driveUse WD Security to set password protection and hardware encryption and protect your files from unauthorized use or access.