Hello Peter,
I've just had a thought! On my T3 I have some converted KN7 styles which are also on my USB stick.
One of our keyboard members has a Tyros 1 which only has a floppy disk drive, so when it's his turn to bring his keyboard to the Club, we all use floppies that contain styles taken from the USB and saved to a floppy disk, using a portable floppy disk drive.
I am wondering whether the styles you are trying to copy have been saved in the same way, from another completely different keyboard - without first being converted.
Do you think this could be the reason a 'flash drive' is mentioned, or am I getting confused here.
Audrey