I am new at this and have found two ways to do it - I don't have the correct terminology in all cases. I assume you mean upload pictures from digital camera to computer.
First I bought a memory card reader - a passive little box with slots in it for different memory cards and a USB lead which I plug into the computer having first inserted the memory card from the camera. The card reader box was about £15.
Well I didn't need to buy it really because the camera (sony) came with a fancy cable that plugs into the camera itself at one end and on the other end is a USB connector together with two other flying leads that I don't use. When I turn the camera on the computer recognises it and asks me questions. Easy really...
Good luck...
Peccavi
March 2009