RECOVERY BASICS

Why file sync is not the same as backup

Sync tries to keep locations consistent. Backup tries to preserve a recoverable copy. Those goals overlap, but they are not the same.

Deletion can sync too

If you delete a file in a synced folder, that deletion can propagate to other devices. Version history or a recycle bin may help, but the sync relationship itself did exactly what it was meant to do.

Corruption can propagate

A damaged or encrypted file can be synchronised just as efficiently as a healthy one. Independent backup history gives you a chance to return to an earlier state.

Managed sync services often include recovery features

Dropbox, for example, distinguishes cloud storage from Dropbox Backup and documents separate restore workflows for backed-up computers and drives. See Dropbox Backup guidance.

Self-hosted sync has the same problem

Running Nextcloud on your own server does not turn synced folders into backups. Back up the server database, user files and configuration separately from the live sync service.

Next: build a backup strategy.