Speaking as a librarian from another planet (Oz...) there are lots of free digital music databases available, but maintaining a database consistently is a time-consuming task.

I find that if you put enough info for retrieval in a filename - Author/Composer/Artist - Title - Date, for instance, and file in subfolders however you like to file, using a (free!) sophisticated Windows Explorer-based program like Everything gives instant retrieval of any or all of those terms.

Just one big folder for Music is all that is required, if you don't want to put in the work.... (and you can search on all file extensions and various media as well.)

Gets my vote for most useful software program of all time.