Unlike standard MIDI files ( .mid ) which contain performance note data, SysEx files transmit the actual DNA of your sounds. On the Korg X3, a SysEx dump can contain: Individual patches (e.g., A00 to A99).
The screen will show "CTRL:ENA EX:DIS". Use the CURSOR RIGHT button to select "DIS" (dump receive). Press the UP/YES button to change it to "EX:ENA" (Enabled).
Layered or split patches mapped across the keyboard.