How should I back up my device data?
Answer
iPhone and iPad
Use an iCloud backup, or connect the device to a computer and make a local backup with Finder on Mac, Apple Devices on Windows, or iTunes on supported systems.
Mac
We recommend using the built-in Time Machine feature in macOS to back up your data to a separate external storage device.
After the backup
Check the most recent backup time, whether it completed successfully and whether you can locate important data. Only content synced to another device or stored independently no longer depends solely on the device being sent for repair.