Everytime i take pictures i upload them all to my laptop with an sd card and then delete them off the card. If my memory card is empty can i take a picture already uploaded to my computer and put it back on the card? The reason im asking is a lot of times i like to edit some photos and i was trying to make a collage for my bf so that my daughter can give it to him on fathers day but i dont have a printer so i will have to take my sd card to walmart or somewhere and print it off there. Thanks, hopefully you can help me! And if i can, how do i do it?