There are two possibilities:
1- Hardware failure: Memory unit in broken / Disk Controller or main board is broken.
2- Counterfeit parts: It means in company’s production lines “some people” used fake memory unit in order to just have cheap sale. Or you tell me other reasons.
Ironically I have googled the message then I realised that the exact message appeared to other people too. It is really impossible to have two same disk size issue for hardware failure rather than Counterfeit parts. So I leave the judgment to people.