They are the newer cards that are Secure Digital High Capacity, .....they are for all kinds of devices, mostly cameras,... they are usually 4GB or bigger, but some are smaller,..... they are a different speed and the older card readers don't read them.
honestly sweetheart i don't know, i'm not the most electronic savvy person. look on the bright side though, if you win this and it's not what youre looking for it's free shipping and it really wont break my heart if you were to relist it and get as many credits as you can for it.