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SD, and MicroSD cards are much more prone to wear than regular flash memory, which has a controller built in.
I've ran operating systems from SD cards, and they usually go bad after a good month to 4 months.
USB memory sticks last lots longer for some reason. The memory on SD cards has lower EEC, AND usually is pressed on a print board, while USB memory sticks have the memory built in their own chip, with controller and everything.
Running an operating system from USB memory sticks usually lasts a good year to two years.
Concerning copying the old card info to a new one,
Is it regular copying, or are there any boot flags that need to be set?
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