Hello new user DmasterD, you ask questions about the recurring theme "multi value tag" and about putting multiple artist names into the filename.
For me, the filename is the worst possible place for multiple artist names; the tagfield ARTIST is a good place.
You can find many forum entries regarding the theme "multi valued tag field" ...
https://www.google.de/search?q=site%3Amp3ta...ulti+value+tags
I recommend you to read something, and then you come back and ask specifically what you want to know additionally.
Maybe this post can help to understand ...
/t/15443/1
DD.20170914.1850.CEST