@churchingnv
did you format the usb memory in the SQ first?
are you reusing a memory stick that had been formatted previously?
was it used in another device in the meantime?
have you deleted anything on the memory stick since it last worked?
did you run a test on the memory stick before you used it at all to verify no errors or problems?
you may have tried to use a bad part of the memory during the save of the show.
do you have a spare memory stick that was formatted on the SQ that you could try now if all else fails to fix your problem?