You said reliable which is going to imply to most of us redundancy. Most will recommend a RAID system with multiple hard drives so if one fails, you still have you're data.
Is that what you meant by reliable?
We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
You said reliable which is going to imply to most of us redundancy. Most will recommend a RAID system with multiple hard drives so if one fails, you still have you're data.
Is that what you meant by reliable?
You need 2 drives, one as backup. HDs, no matter how good, can fail at any time without warning.