Re: Hard Drive Reliability >2TB
HDDs fail. There is no 'if' to it, only a when. All mechanical hard drives will fail eventually. This is why you want backups and preferably redundancy on top of it.
As there are only a few HDD manufacturers left, I don't think you'll find meaningful differences in reliability between them. Just architect your backups and storage to be redundant and stable enough.
As the universe is curved, there cannot be a straight answer...