After you set it up, Time Machine backs up your computer every hour without any more effort on your part.
The great advantage of using Time Machine on a Mac is that it not only keeps a spare copy of every file, it remembers how your system looked on at any given day, so you can revisit your Mac as it appeared in the past. Time Machine automatically backs up your entire Mac, including system files, accounts, preferences, music, photos, movies and documents. Connect the drive, assign it to Time machine and start enjoying some peace of mind. Time Machine is the built-in backup that works with your Mac and an external drive.
