Writing old bios firmware to the new one PCB

Hi Guys! Does anyone have a tutorial how to write the old MY Bokk V3 8TB microcontroller of the HDD it self to a new PCB? I checked the USB controller (the one with the USB and power connector) but it is working just fine on another My Book HDD, but the PCB of the HDD isn’t. I put on another PCB from similar HDD and it spins the drive, but not recognizing it. The Older one, recognized, but show a 0 bytes drive and asking to initialize it. I have data on HDD and I wan’t to get it back soon. Thanks!