I think I found the best way (It was someone else's idea) to store floppies during a performance.

Have floppies of different colors for easy identification. I bought a 10 pack of neon colored floppies. They come in a plastic container. I tape velcro to the side of my PSR2000 and velcro to the back of the plastic container.

Now I can arrive at my gigs with the plastic container in my gigbag. I just open it up and attach it to the side of the keyboard.

Another tip. If you use floppies for styles, save the style in the tempo you want for the song you use it most with.

Larry