Static electricity isn't particularly good for SD cards. It's not good for the other components on the board either. Don't wear socks and shuffle your feet on the carpet before handling the electronics.
Best advice I can give you, is always keep a backup of your SD card data. You never know if/when the card might get corrupted, fried, or just go wonky. In an emergency, you can always run down to your local Walmart, Best Buy, etc and pick up a new blank card.
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