Re: OT: flash memory longevity?

Rui Maciel wrote:

So, can anyone help me? How long can I expect data to remain stored in
a flash memory card?


Manufacturer's data sheets usually claim 10 years.
Bits will rot one-by-one and NAND-FLASH has ECC codes
to compensate.

They do wear out in repeated erase-reprogram cycles
(in the order of thousands). For long term storage,
you should be OK if you refresh (erase & rewrite) the
contents once every five years or so.

SD cards have a built-in controller which will replace
defective blocks with reserve space on such occasions.

Kind regards,

Iwo

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