I want to delete pictures of my card for my camera

I have a 4GB card for my Nikon Camera and i want to put all the pictures onto my computer and then delete them off my camera. How do i do this? Is it better if i just buy another card?

No, you don't need to buy another card. After you move all your pictures to the computer, go into the menu and find "Format card". Do that everytime you move all your pictures to the computer.

Download them, put the card back in your camera, reformat it and start taking pictures again. I reformat my cards daily.

Connect your camera to your computer by usb and move them over, that's all. Or you put the sd card in a reader and move them. No need to reformat the card.