Can't see my music in folders on my WD drive

I took all my music off one drive and put it on another one through my mac and now the music that is in folders can’t be seen. I looked at the properties and it shows there is GB used but nothing showing. What is the problem with this. the songs i put in with out folders show up just fine. uuuggg please help.

Check the properties of the folders to see if any hidden attributes were added.

You can try creating new folders as well.