If you wish to Backup the DD-500's settings using a USB cable, the method to do so is via the MIDI Bulk Dump function.
Here are the steps:
MIDI Bulk Dump: BACKUP
1. Using a USB cable, connect the USB jack of your DD-500 to an available USB port on your computer.
2. Open up a DAW application (Audio/MIDI Recording program) create a MIDI track
and set it up to record SYSEX messages.
3. On the DD-500, press EDIT.
4. Using the down arrow, select MIDI Bulk Dump.
5. Choose the range of settings and presets that you wish to backup.
6. Start recording in your DAW.
7. Press the EDIT button on the DD-500. "Sending BULK DATA" flashes in the
DD-500's display. Continue recording in the DAW until the DD-500 returns to the
MIDI Bulk dump menu.
MIDI Bulk Dump: RESTORE
1. Using a USB cable, connect the USB jack of your DD-500 to an available USB
port on your computer.
2. Start playback in your DAW. The DD-500 will detect the incoming MIDI data
automatically. The DD-500's screen display "MIDI BULK RECEIVE" once the data
begins loading.