Just like the USB thumb driver, which has a built-in driver, I would think you would need the proper driver in order to make it work. It's possible that the floppy's driver, which is in the keyboard, may recognize the card reader. If so, you're home free (so to speak)!
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.)