How do you swap SD cards?

[Putty]

My 8gb appeared to have a lot of crap on it when I mounted it today. I got a 16gb card, do I just put it in and it writes all that stuff to it or do I need to copy paste all those folders?

 

[GeneralPatton]

Copy your 8GB files to your computer, then mount your 16GB card and copy the files back over onto the new SD card.