The boot Configuration Data file is missing

[admin]

Thanks for the reply but it's not a Virtual HD it's a full NTFS with the FAT32 bit
But BCD becoming corrupt seems to be a common Windows 10 problem but Because it's installed on USB and GPT and not mbr I can't find a way to fix it.

I think it must be possible to fix it with Diskpart because I got it to boot again but this messed up the BCD of my internal eMMC32gb BCD so I had to restore it. There probably is a correct procedure of commands that would fix this but beyond my knowledge.

You should be able to use BCDboot to fix the BCD file, but before you do this, you should assign a letter for both the system and boot partitions, which can be done by DiskPart.
https://www.howtogeek.com/197296/how-to-...e-letters/
https://docs.microsoft.com/en-us/windows...techref-di