If you go to main menu, gs3, gs3, memory tab (at top) you should have a list of files at the bottom of the page. Look for the date of the file in question. See if it shows “exported”. Either way, export it or re-export it. I have had files that show as exported but had to re-export them. You probably should have changed your swath width instead of header width. Assuming you were using auto steer. Exporting to thumb drive should have worked I would think but maybe that file is somehow stuck? If you can’t get it to upload maybe one of the Deere guys here can help. One other thing, if you cold boot the display by unplugging it before shutting the key off to save the data it will be lost.