What's a good medium for hoarding data. Other than tape. Normally I use 2tb hdds but I am hesitant to Smr hdds now after needing the data recovered and how difficult its being. Would CMR be better? Flash Storage? Glitch or accidental formatting would remove any hope of recovering of a SSD. Don't need it for Casual Use just An easy way to store it with little risk to data loss and easy to recover if it does.
A friend. Make your friend hoard data. And share it with you.
Otherwise large HDDs, at least 18TB, are most likely still the cheapest per TB. If you mostly write once and read much, much more, then SMR is fine. As long as it isn't in a RAID array that may have to be rebuilt.
SSD is, I think, better in all ways, except price and capacity. So SSDs are very bad for bulk storage.
Multiple backup copies on different media, stored at different locations, is how you reduce the risks of data loss.
Obviously the best medium to store the data is HDD, just because of the $/TB ratio. You can get high capacity drive for really cheap. Also, if there nothing special is required in terms of performance, I wouldn't look into SSDs.
In terms of actual use and access, CMR is much better. Flash would be better yet. Higher capacity hard drives are the most economically efficient option.
Mind if recoverability is a priority you'll have to avoid Helium drives. Also backups >>>> recoverability.
Any medium can fail, and if you need something and get it easily any other way you should have backups, not micromanaging which one fails more, CMR or SMR.
HOWEVER, when discussing cost effective and hoarding the best price/TB is by far for larger disks and larger disks aren't SMR, problem solved.