datahoarder
Who are we?
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). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
We are one. We are legion. And we're trying really hard not to forget.
-- 5-4-3-2-1-bang from this thread
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Drives fails so always be ready for that.
How many drives you buy depends on your goals. I wanted a small nas so I’m using raid1 and just have 2 drives.
If your nas has more drive bays and supports it you can start with 2 drives and simple add a drive as needed. You wouldn’t be using raid at that point as man nas have more flexible options. My Synology calls it SHR.
This assumes you need simple file storage and not running multiple VMs with databases.