Backup rom xiaomi redmi note 5

[hienblackberry]

I want try back up file rom of mi note 5 pro ( global ) to mi note 5 pro ( china ). Don't need wait 30 day unlock bootloader. but I can't backup rom mi note 5 pro ( global ).
Ufi dongle error
Please help me.

 

[lioncooll]

can u tell me how to Unlock Bootloader,,,,,