Can I return my card reader to Office Depot?

-I bought a 23 in 1 USB Card Reader today, but no computers are detecting it. I tried on both of my computers. I threw away the box it came in, but I still have the receipt and the manual, can I return it and get another one, or something? Help Please!!I'm pretty sure you'll need the box. So dig it out of the trash and take it back. You have I think 14 days to return it.