Scott on Superior drummer - user Midi doesn´t work

The User MIDI folder is for MIDI patterns or grooves that you make yourself (you are the user). It will be empty until you create some grooves and put them there.

The Core MIDI is located in the MIDI Browsers above the User MIDI section, under Superior Libraries. Click the Superior Drummer 3 folder (shown in your pic) to expand the sub folders and to view the MIDI.