You can use Time Machine, the built-in backup feature of your Mac, to automatically back up all of your files, including apps, music, photos, email, documents, and system files.
Questions on how to back up your Mac? Click here for help
If you back up your iOS Device, you’ll have a copy of all your information ready to go back onto your device in case its ever replaced, lost, or damaged.
Questions on how to back up your iOS device? Click here for help
Before any service can be performed on any iOS device, this is required be deactivated.
Questions on how to turn off Find My iPhone? Click here for help