Just got new eMMC chip from "parts4repair" , removed dead one M4G2DE, soldered new Sandisk SDIN5C2-8G - and phone booted straight away ! :)
So I'm back on the road after ~35$ repair :cool:
here is zip to flash in recovery with folders structure from OP , just tested - all ok :
Good tool to backup partitons before bootloader unlock and after, to see whats changed :)
Thanks for instructions one more time!
As h850 user i had to patch LGUP.exe as per your instructions and /model/Common/LGUP_Common.dll (just searched for "3d 09 01 0b 80 7f" and replaced with "b8 00 00 00 00 eb") .
don't know about url, but here is ota 4.4.4