The information you supplied does not appear to address the difference between a usable lifetime of the media/device as opposed to the shelf life (memory integrity) of media that is not being used.......
Hi
TP - thanks for the input - my point was that these 'solid state' memory devices appear to have more longevity regarding maintaining the accuracy of their data than some of the legacy storage options, like floppy disks - of course, whether a device 'sits on the shelf' or is used (or abused) on a daily basis will impact on its reliability - not sure how well this has been tested, but camera SD cards can certainly go through a lot of abuse that would impact on their reliability.
Personally, I would not rely on flash memory SD cards or USB flash drives to store my 'important' data on a long term basis (whatever that may mean, e.g. a few years vs. decades, the former more likely for me); if so, I would check their status often and transfer to 'newer' media, as needed. SO, presently if others visit this thread and want to know about 'long term' storage of their personal data, what would be the recommendations? At the moment for myself, I am using redundant magnetic & SSD storage devices (don't trust having just a single backup) - if expense was not an issue, I would switch to SSDs only but continue to use redundant devices, i.e. at least two.
What the future will bring will likely not be of much concern to me at my age, but even using DNA storage is being contemplated, so there are plenty of guesses beyond what is currently available. BUT, just my two cents - Dave
P.S. Optical storage (e.g. CD-R, DVD-R, or rewritable optical media, the latter that I would not trust) has been discussed - not a bad option but needs to be tested periodically - probably a dozen years or so ago, I made a bunch of CD-Rs of a lot of ripped CD music as MP3 files for my basement workshop (had about 6 hrs per disc) - listening to several recently and all playing fine - just an anecdote that might be of interest.
P.S.S. Some may believe my suggestion of DNA storage just a laugh? But, the future of computer storage is 'wide open' and likely not be seen in my lifetime - however, take a look
HERE for some discussion of DNA as a potential storage option - fascinating stuff - has worked on the planet for well over a billion years -