Music Files showing

OK, strange problem I cant resolve.

My Serviio Server is displaying Music files (MP3) and I cant figure out where they are on the server?
I didnt have ANY of my shared folders with Audio enabled, even if I did there are no MP3 files in those folders?
The music plays great - just trying to determine where these files are streaming from!?

I feel like an idiot, can someone please tell me how to determine where the files are coming from?

I am using BubbleUPnP on my devices to view files. Any insight is greatly appreciated.
(LOVE Serviio btw, been using it for years and it is amazing.)

Thanks in advance.

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