To all, I had an old memory card corrupted as I was shooting. I was lucky, I had second card backing it up. As I am going to replace it, I will continue to use second card as a backup, do they need to be at the same speed and type?
no any combinaton will do and any size though it takes the card with the smallest capacity to give shots remaining ...I keep one 16 gb in the top slot and never remove it and use another 16 or 8 in the lower slot
