I recently purchased the Gotek USB Floppy Emulator for use with my old Yamaha PSR-550 synthesizer. It works perfectly, but unfortunately, the software that comes with the emulator is in Chinese and impossible to navigate and use.
After some searching, I found this site, which offers a download for some software which appears to be identical to the one that comes with the emulator, except that it's in English - and actually works.
The software originates from a German company which used to produce a very similar emulator (that I suspect Gotek copied).
The German company's website it now down, but I've uploaded a copy of the software (which appears to be abandonware) to my server, and you can download it here.
Also, if for some reason you require a copy of the original documentation and software that comes with the Gotek emulator, I've uploaded a copy of that too, which you can download from here.