Right now, the BackupBackend provides information on backups based on the file system of the installed server.
Should this backend support external backup storage (eg. AWS S3, Google Cloud Storage, Azure Blob Storage) or should we give up this backend that doesn't seem to be used?
- by default, BackupBackend is configured to look at the bak/ directory
- when performing offline backups into other directories than bak/, the BackupBackend needs to be updated afterwards with the path of these directories to be able to list the backups.
- it has an issue when we backup more than one backend (bug)