Larry Jordan has an interesting article about the lifespan of Flash or SSD media:
https://larryjordan.com/blog/the-life-span-of-flash-ssd/
According to his Micron sources, the wafers which are used for Flash and SSD systems can be optimized 3 ways, but can only be manufactured to do 2 of the 3:
For speed
For resilience: maximum multiple reads/writes
For longevity
Currently wafers are optimized for speed and resilience.
Consequently unplugged media should be good for maybe a year or two without losing data. Flash and SSD are definitely not a long term data storage solution.
https://larryjordan.com/blog/the-life-span-of-flash-ssd/
According to his Micron sources, the wafers which are used for Flash and SSD systems can be optimized 3 ways, but can only be manufactured to do 2 of the 3:
For speed
For resilience: maximum multiple reads/writes
For longevity
Currently wafers are optimized for speed and resilience.
Consequently unplugged media should be good for maybe a year or two without losing data. Flash and SSD are definitely not a long term data storage solution.