Hi, I need to down load from the internet to a SD card but I don't have a slot on my computer to do this. I do have a SD card slot on my printer and was wondering if I can download from the computer to the printer on the SD card?

I doubt it. USB SD card readers are pretty cheap.

Actually the card readers in many printers can be used to to write to a card. Insert a card in the printer then open up Windows Explorer and see if the card shows up as a drive letter.

If not, as KISS said, you can get a USB reader pretty cheaply.