Hi Scott,
It's a standard floppy disk drive, one that's available for under $20 at any computer store. So far, my 2000s and current 740s have held up remarkably well, especially considering that I play in a lot of smoke-filled bars where you can cut the smoke with a knife. This environment trashed my first 740's floppy. When I opened the case, there was a thin layer of brown cigarette smoke tar on every component. I took the floppy to my local computer guy and he pulled one off the shelf that was an exact match. The first words out of his mouth were "It's just a standard floppy drive--nothing special."
The same, exact drive is what is also in the 2000, and I suspect lots of other keyboards. If your floppy ever does crash, and some will eventually die, they are easily replaced.
Cheers,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)