Once you started a full Webuzo Backup seem the panel never give the possibility to stop the process.
You can discover that space will be not enough or maybe you need for emergency stop this process as you can have a big backup to do and there is no possibility to stop the process from the panel. Will be nice to see progression of the backup or scheduled job and stop it.
If the backup is stopped backup should be deleted, no partial backup should be showed to the user.