@jrjab: The output looks good so far, you are using the latest error correction (BCH16). One thing that could point to a direction is the exceptions oyu have caused by your updater.exe? Could this be the trigger for this issue?
Are you also able to see the files diapering and appearing in different folders in our image? If not, please check once if you format your FlashDisk using Transaction save FAT (TexFAT). This is configured in the registry (Storage profile).