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Whenever you set up a new iOS device, you’re asked to back it up to iCloud (Apple’s online storage service) using your Apple account. We recommend doing this because the app saves all your files, settings, contacts and so on and lets you export them to a new device if necessary.

However, once you’ve exported your backup to a new device, you should delete all previous backups on your iCloud account to save space (because you only get 5GB of free storage). To do this, tap Settings, General, Usage, then Manage Storage (under iCloud). Here you’ll see your previous backups listed. Tap to select your old device, tap Delete Backup, then Yes.