> For me using synchronization software (Seafile, Syncthing, ...) to do backups is dangerous. Yep. Just synchronisation on its own for backup is at best better

> For me using synchronization software (Seafile, Syncthing, ...) to do backups is dangerous. Yep. Just synchronisation on its own for backup is at best better than nothing, a first step. It fails to protect from at least three very common occurrences you need backups for: accidental deletion, incorrect update, or corruption - the broken data is quickly synced everywhere. Adding snapshots and regular integrity checks is essential.