Korg M1 Editor -

You can transfer sounds created in the plugin back to your original M1 via System Exclusive (SysEx) messages. Sound Quest Midi Quest (Hardware Editor/Librarian)

The M1 has 100 Program slots (internal) + 100 Combination slots. No card slots except rare RAM cards. A good editor includes a librarian to: korg m1 editor

For those who prefer a hands-on feel away from the computer, mobile solutions are a game-changer: You can transfer sounds created in the plugin