Offizieller Kommentar
Do you mean you prepared folders of playlists, or folders of songs? I'm not sure I understand...
If you want to sort the songs within a playlist, you can do that by pressing the MENU button. To add additional criteria, you would do that within rekordbox by clicking on the USB drive itself within rekordbox:

You can then add items from the left to the right to activate them as options on your drive.