I just started my college classes and i have two photography classes and need something to transport my pictures from photoshop 7. My teacher said we could either get flash cards, usb pens, or cd-r cds. i probably wont need the flash card right away because we probably wont be shooting with digital cameras for a while, so i was gonna go with the usb pens or the cds. is there any main difference between the two such as price or picture quality. and does any cd-r blank cd work like the ones you would burn music on too. thank you.