how to delete a folder from Panasonic Lumix camera?

On my panasonic lumix camera two folders show up when I want to move pictures from my camera to my pc. On with new pictures and one with old pictures I can not delete. I think this second folder is on my SD card. I’ve deleted all the photos via the camera but it does not delete the photo’s in this second folder. My SD card does not fit in my laptop. How can I get this folder off my camera?