Thanks PCLab, the one wd hdd is in my hand is spinning properly flash light also working no bad noice, but it is not detecting what could be the problem, PCB or HDD firmware ?. there is any specific tool for read and write PCB.
it is possible to copy WD External Ultra HDD PCB Bios firmware and restore another same model PCB ? , using ROM Programing software.
WD HDD
2060-771961-001-REV A (PCB)
8819446-NDB2 NKW4310.2 JW 1417 C0EM TW (CPU)
WD NAUTILUS A21X599