This tutorial will take you step by step through setting up and using Time Machine to backup your Mac.
Backups can (and usually do) save so much time and hassle. Your Mac comes with a fantastic backup solution right out of the box, so there’s no need to install any additional software. If you plug in an external hard drive and setup Time Machine you’ll have backups constantly and automatically created so all of your files are easily recoverable.
To add a file or folder to your “don’t back up” list, click the small “plus sign” ( + ) button.