A backup includes information such as the layout of the Home screen, app data (such as Safari bookmarks and Calendar events), anything you can set in Settings on the device (including restrictions, certificates, and some account types), contacts, and the Camera Roll (but not photo albums). Backups don’t include apps or media that you would normally sync using iTunes in macOS 10.14 and earlier and the Finder in macOS 10.15 and later or store in iCloud. A backup of an unsupervised device is identical to and interchangeable with a backup and can be restored only to an unsupervised device. Similarly, a backup of a supervised device can be restored only to another supervised device.