The Picture Situation

Okay so here's the dealio with the pictures. I am taking as many as I can, unfortunately, my computer says that I do not have enough space on my hard drive to load any more pictures from my camera to my computer. So, logically I have been trying to find all the things that I can delete and deleting them. I deleted over 400 pictures the other day but then it only let me load 6 more pictures so I don't really understand what is going on there. I am sorry and I am trying to fix it as soon as possible.