: A common source for the N.M338.801 USB Firmware and BIOS Bin files.
: Tech groups like Hashmi Elecom or Softwarezone.ga often share .rar archives containing these specific eMMC files. Download M338 801 EMMC 4GB 512M SAMSUNG REM rar
Because these are generic Chinese-manufactured boards, official support sites do not host the files. You must use technician community forums or specialized repositories: : A common source for the N