Saving sounds separately (onto disk) is what I was talking about in the last paragraph of my last post on this thread. Don't worry about saving your custom (USER) patches to disk and then writing over the USER patch memory...you can load your patches back into USER memory from the disk. When you save in sound mode, the entire USER patch, rhythm, and performance memory is saved and will be recalled when you later reload the USER sounds from the disk. Although all 128 patches, 32 performances, and 2 drum kits are saved each time, very little memory is required, so you can fit a bunch of sound files onto one disk.