Free storage has a limit, so keep an eye on it
Google account backups share the same free storage quota used by other Google services, so if that quota fills up, backups can pause -- clearing out unneeded files or upgrading storage keeps it running smoothly.
Not every app is covered by this backup
Standalone messaging apps you install yourself, such as WhatsApp, usually manage their own separate backup inside the app rather than relying on this system-level backup, so it is worth checking their in-app backup settings too.
Frequently Asked Questions
What if my Google account runs out of storage?
If the free storage quota (typically 15GB) is exceeded, backups can stop working -- clearing out files you no longer need or purchasing additional storage will get backups running again.
Do chats from a separate messaging app get backed up too?
No -- an individual app like a standalone messaging app manages its own chat backup separately, independent of this system-level Google account backup, so it needs to be backed up through that app's own settings.