They usually out last your camera. I've never had one go bad. I have a bunch of old 32mb to 512mb cards out in the garage that I have no idea what to do with. They cost a lot of money back in the day.
davidk wrote:
I have several 4GB memory cards that I have used for ages with no apparaent image deterioration. What will be the signs that the card is approaching its "end of life"? With every upload, I check the condition of the card's metal contacts, and they appear to be in good shape.