You can also save them as presets and load them up here.
It’s always a good idea to let people know what kits you used when you share presets as not everyone will have them but if they’re made using the BFD3 library you should be good.
The midi would need to be one of the included BFD3 midi grooves or an imported midi loop so as long as BFD3 has access to the midi file it will be saved within the preset by default.