Upgrading Windows 10 OS usually need much storage (suppose more than 12GB).
I think the reason why you failed to upgrade is that Z83-4 lack of storage.
You may manually re-install the 1803 version by following instructions below: https://theminixforum.com/index.php...3-4-firmware-re-installation-instructions.15/
Remember to backup your data, because re-installing the OS will erase everything you have on the device.