Hi franksboard,
A floppy drive emulator replaces the original floppy drive in older keyboards (that didn't yet have a USB-to-Device terminal). To do this, the desired files (e.g. the contents of floppy disks) are copied to a specially formatted USB stick on the computer. Then you connect this USB stick to the keyboard's floppy drive emulator.
All newer keyboards, such as Genos, have a USB-to-Device terminal. So all you have to do is copy your MIDI files on the PC to a USB stick. If you have MIDI files on floppy disks, you will probably need an external USB floppy drive that you connect to the computer to copy the files from the floppy disks to the computer and to the USB stick.
Best regards,
Chris