Pauline7799 you can’t export just one playlist, you can export just ones playlist TEXT LIST so you can see the order of the playlist but this is not an export of the actual playlist.
The Full backup is the only way to just make a FULL BACKUP nothing else is possible, everything is contained in this file and you can’t open it you can just restore it later and everything will return to the date you saved it any new songs from then on will be lost , so the idea is make a full backup more regularly to save songs/playlists you are not prepared to loose.
In a way it’s simple and good but it has its issues.