I just bought two WD40EZEX 4TB drives from an online seller.
When I installed them I got seek errors from one and absolutely nothing from the other.
When I try to register them on the WD site, or initiate a warranty claim I get “No data found”, I assume in reference to the serial numbers.
Fakes? They say “made in Malaysia”, but were shipped from China, whic is ironic as I live about 2Km from the old WD Factory.