I have updated the game code many times on some of my stern sam machines, but what I have never been able to figure out is how to backup the game code to usb? Selecting backup instead of update from the menu I am told to insert the usb stick or press back. I insert the usb stick that has been used many times to update code and nothing happens. I've tried with dipswitch 8 on and off but I have never been able to get any further. I have tried 3 different USB sticks, nothing ever happens inserting the stick.
Anyone know where I'm going wrong?