ZSK 172 data transfer

Hi

I know, its an old machine. But my father died, he teached me lot of things before. I know how to make the design/embro files, how to use the machine. I did the embro design, i saw that father used .dsz files. I made it. EmbroMailreader (.ema - its something like special floppy backup) - and with this program he transfer the data files to floppy.
And here is my question. I cannot find what kind of transfer method I need to use. Coz with simple copy, the machine cannot read - i tried ZSK/Tajima orginal, and these things, but the machine still cannot read the floppys. Maybe I need to use ZSK stiches data writing method, but its not option, I dont know why...
I try to open the last floppy what he used, and figure out what kind of data it has, but the floppys is unreadable for windows only machine can read it, i tried.
I just remember something that my father told me years ago, that win7 or win10 has problem with floppys or writing on it.

If somebody has any kind of idea with that oldtimer, let me know!

Thank you very much.