What happened?
When flashing the firmware with the Alternative Method, you might get the text "Firmware file missing in the USB flash!".
Error name: No file on USB
Error code: #12604
This error happens when you use the alternative method of flashing the MINI/+ firmware, but the printer does not find any firmware in the USB drive that can be uploaded to the printer.
How to fix it?
Download the firmware and if necessary the bootloader, and transfer it to your USB drive. Make sure to unmount the drive from your operating system before physically removing it.
Insert the USB drive back into the printer and restart it to initiate the flashing procedure. In case the procedure does not start, reboot the printer using the reset button directly next to the knob and while the printer is booting up, press once the rotating knob (more about this on alternative method).
If the issue persists, the problem might be in the USB flash drive. Find any other USB drive in your household, make sure it is formatted to FAT32, copy both firmware files and repeat the previously described procedure.
Are you still having issues? Contact our support team and let them know, that you have tried to fix the issue with these instructions. We will take it from there.