So you don't want to lose the music and styles that you have already made.
You would like some new sounds and styles that can be readily used.
You would like to be able to back up your material to something bigger and faster than floppy disk - a memory card/stick of some sort.
Finally you would like to be able to use style files from other manufacturers keyboards e.g. Yamaha.

The answer is simple - go out and buy yourself a used Technics KN7000 which will meet and exceed all the above requirements.