Is that not the point of an SD card? If an SD card is not read and written to, then what is its job. There are cheapo SD cards that have a much lower read/write life, and there are higher quality SD cards that have a much higher life span. Buy a good one to start with (not that much of a higher cost) and read/write all you want.
Most people do not know that SD CARDS FAIL or WHY it was just a post for knowledge unless you think keeping people in the dark is a good idea. Also the memory in the older scanners will fail also they just are not update weekly.