Device backup
Also known as: phone backup, what is a backup, iPhone backup vs cloud
A device backup is a copy of your data — apps, settings, messages, and media — saved to the cloud or a computer so you can restore it after a reset, loss, or new device. A backup is a copy, not freed space: it never reduces the storage used on the device itself.
- A recovery copy of apps, settings, and content
- Does not free local space — the device keeps its files
- Uses space in the destination (e.g. iCloud or Google)
What a backup is for
Backups exist for recovery. If your phone is lost, broken, or wiped, a backup lets you restore your apps, settings, and content onto the same or a new device. iPhones back up to iCloud or a Mac/PC; Android phones back up to Google.
A backup is a snapshot in time, separate from your live files. Restoring brings everything back as it was when the backup was made — which is exactly why it is not the same as cloud sync.
A backup does not free space
Backing up copies your data somewhere else; it does not remove anything from the device, so your local storage bar stays the same. The backup does, however, consume space in the destination — for instance, an iCloud backup counts against your iCloud quota.
To actually free the device you have to delete or offload content. A backup is best treated as insurance you run before cleaning up, not as the cleanup itself.