Sync favors current state
Changes—including deletions—can propagate between synchronized devices.
Backup favors recovery
A good backup should let you recover data after a device or primary copy is lost.
Services can provide both features
The exact behavior depends on the provider and configuration.
Test recovery
A backup is more trustworthy when you know how to confirm that files are present and recoverable.
General consumer technology information only. Interfaces and menu names change. Before resets, reinstalls, storage changes or other major actions, verify that important data is backed up and use current manufacturer/service-provider instructions.