Yes it's because the PRIVATE folder is in the root and so is the KN24PRG.DAT.

You're right it is possible for the operating system to be a problem, I've had problems before too but not so much with file transfer, well I can't remember a file transfer issue. More likely when it is unzipping. If the format is done in the keyboard then the file system should be fine on the card.

The only way I can help further is to try it on the same model. We'll try that beginning of Feb and will try the file transfer with Windows 10, Windows 7 and XP. It will be interesting to find the correct procedure.

I had a similar problem on my KN7000. In the end I found that I had to press and hold the buttons very, very hard. Maybe I had some bad contact on one of the buttons. I also seem to remember that I used google translate from German to English then and there was some small thing I missed from the translation. AND I remember that one of my floppy disks had a problem and I had to re-write it on a new floppy disk. Because KN7000 does the upgrade from floppy.

I'm stumped right now smile
Help to preserve information about Technics Keyboards.
KN7000 KN6500 KN6000 KN5000 KN3000 KN2600 KN2000 KN1000 KN901 KN800 P50 WSA1 AX7 GA3 PR804 Liverpool Tyros 3