How to setup the Gotek SFRKC30.AT3 1,44Mb downshift to 720kb

[Vladistone]

I puchased 4 unit of SFR1M44-U100k with SFRKC30.AT3 desk and AT32F415 CB17 chip
how to prepear emulator for good workin with Korg DSS-1?
when I try to GET program, then receive the message: DIsk not ready.
How I understanding - it`s mistake due to wrong emulation.
uncanpable to DSS-1. Have to 720kb, not 1,44Mb settings.
I also used the bfstroy configuration files from the link, but nothing worked either