Right. We are moving away from FTP and using local server to remote storage server via SFTP for "remote backups", so Panel backup target is set to "Server Reposistory" which creates the INFO metadata XML file.
Now the question is: how to create the complete/full backup including content as a TAR file to be then "moved" via a process external to Plesk, without using the command-line option to recreate the same "backup" previously scheduled which produced the metadata XML file. I may be forced to forgo the Panel Backup and do everything with the command-line option.
P.S. It would be great if Plesk Panel starting offering (native) SFTP instead of, or in addition to, FTP.