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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It depends how critical the data is.
SSDs and flash are great for speed, but as other comments have mentioned, they can eventually lose data more than other mediums. However this reportedly isn't likely to happen over the normal rated timespan of the devices, unless there is a critical defect.
Magnetic storage will likely last longer, and as it is a much older tech, is less likely to have firmware bugs and other problematic surprises. Plus, as you can see on https://diskprices.com/, the cheapest medium per TB remains magnetic storage.
Then there are tapes. The drives sure cost a hefty sum, but if you have loads of data to backup, this is likely the cheapest option.
Finally, optical. Optical is great in the sense that is is physically a ROM, so data cannot get compromised by mishandling or other staff mistakes; but it still can have issues with the reflective layers peeling away from disks.
So, in the end, I would personally not recommend using SSDs for data backups, out of precaution. Sure, SSDs will likely retain all data just fine for years to come, but I want to be able to store data for as long as possible, with the peace of mind that only magnetic storage will afford me. Plus, if your data is worth backing up, it is worth whatever extra price or effort you will have to do with.
As for the other options, well, they all have their use case, but I don't see much advantage for them in the general use cases. Just make backup copies of your data on magnetic drives, in a few physically different locations, with proper access control.
Thanks! I don’t mind spending some money, what I was trying to communicate is that I don’t want to spend $1000 on some solution.
I think I’ll get a mechanical drive and a few 256gb usb drive or maybe an ssd and have a few off site copies in case one medium fails.
I’ve never had an ssd go bad, but I’ve had external mechanical drives fail over time, so I’ve been hesitant to trust them.
I had SSDs go bad, and mechanical hard drives too. The major plus for me is that with HDDs, it is somewhat predictable, while with SSDs it has always been sudden (in my experience, at least).
However, there are more parameters to consider. The storage temperature, the relative humidity, to backup frequency, etc. In the end, if you want a 100% time proof solution without caring for the costs, engraving a crystal, storing it underground in a lead-lined container, is probably the surest way to go. Everything else is a compromise.