I don't have the Ketron, but from reading jm-bogey post, it sounds like he's trying to copy the 12 floppy disks onto the hard drive first and then upgrade from the hard drive. I don't think this would work. With my pa80, you need to extract all the file to each floppy disk (5 disks total) and then insert them, one by one, into the floppy drive to do the OS update. It can't be done from the hard drive.
Tom G.
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Tyros 4