Would you guys that have experience and classified "classical music" post how you did it please?

do you have no folders and read music as you chose to save it?
Do you have one folder per composer?
Do you have one folder per composer + subfolders : one for sonatas, one for cantatas, one for concerto, and so on?
Anything else I do not see? (god forbid)

...and thank you ...sincerely.