First, to answer your question, No. That keyboard won't play floppy disks.
To answer your second question, Yes, there are plenty of older model keyboards that play floppy disks, but unfortunately, most of them are no longer in production, so you might wanna check out Ebay.
Here's a list of Keyboards that do use floppy disks, unfortunately most of these are no longer in production:
1.Korg Triton and Triton Studio
2.Korg Trinity,
3.Korg N364,
4.01/W
5.Roland Fantom
6.Most of Roland's KR series Digital Pianos
7.Yamaha's "pre-motif" keyboards
I can go on and on, but like I said floppy disks would be more of a setback for the competitive musical instrument industry.
Besides, floppy disks are going the way of the dinosaur anyways. They are bulky, not very durable, and don't store half as much data as newer technologies. There are far better keyboards that use more reliable storage media, such as SD cards, SmartMedia, CompactFlash, USB flash memory, etc. You should consider getting a keyboard like the Fantom X8 which is much cheaper and uses storage media like the ones I listed above. Then, you should transfer all the data from those prehistoric floppy disks to the medium appropriate for the keyboard.
