Are all digital camera memory cards the same and do they all fit readers?

No and no.





There are several different types of camera memory cards. CF, SD, SM, XD and MS are the most common. So you can't buy any camera memory card and stick it in any digital camera. You have to get the memory card in the configuration that matches your camera.





Most multi memory card readers can read those cards but you have to read the box to be sure.