This option controls the file format that Virtualmin will use for this backup.
The available options are :
- Single archive file
- All virtual servers are storing in a single file, in the location specified
by the Backup destination.
- One file per server
- Each virtual server is backed up into its own separate file, in the
directory specified by the Backup destination.
The final option is recommended, as it allowed individual virtual servers to
be more easily restored, and saves on temporary disk space during the backup.