I take it that you recorded SONG-files from your keyboard into the USER area and than SAVED them on a floppy.
If they are on your disk and you put it in your keyboard the first title on your disk should show up next to A on your screen (SONG)press that button A and start the song playing with start/stop in the top left panel.
If nothing shows up I am afraid you did not save it correctly.
Your manual will tell you how to save recordings.
If your floppy shows the titles when you put it in a computer they should have the extension xxx.mid
