I have a EOS 550D. I can't see a folder function. Does that mean this camera will not put photos in a folder? Or is there some way to do this? I put a folder on the memory card via the PC, but the photos are just listed as normal, outside the folder.
You should only format SD memory cards in the camera. I would avoid the SDXC cards, 64GB and larger. Stick to the typical cards that were available a year or two before the camera was released.