MODO Drum installs it’s midi files in this folder on MacOS.
/Library/Application Support/IK Multimedia/MODO DRUM/Grooves
What I have found in my DAW is that if I drag and drop the midi files from within the application into the midi pattern editor, it resets velocities for some reason. So I started making a sym link in my docs folder to the MODO midi folder and I import it directly into the midi editor and this somehow keeps velocities. On MacOS the command from terminal is:
ln -s "/Library/Application Support/IK Multimedia/MODO DRUM/Grooves" ~/modo-grooves
Sharing in case anyone finds useful.