Music Library in Local Files

[Wazza4]

When going to settings under local files when you show local files you can show songs from downloads and music library and also add another source.

Can anyone advise where the music library file is on the computer as it does not show a link to it.  I have some songs not from spotify on it and wish to remove some of them but cannot find the folder in the hard drive to do this  and spotify does not tell you the location.  There is somthing under advanced and storage but that does not seem to link to the songs that are shown in the music library

Thanks