Hello Kit,
I know it can be laborious having to save every move you make, but if I were you, I would do just that - save your settings to an SD Card. That way you will accumulate a wide variety of drum sets/sounds.
Or, as suggested by Bud, save to a floppy disk until you have filled all 20 files and then COPY them all at once to your SD Card.
It is much quicker than saving each file to the card individually.
Hope this helps.
Audrey