I take extra SD cards with me bring the used 1 home my printer has ports for all the different cards. Look at them on the comp. delete bad ones then file the ones I want to keep and it was a pretty inexpensive printer. as far as the camera not showing you the pictures you have to format the card to the camera when the card is empty put it in your camera and take a picture with it and then look at it if you can see it then it should work when you use the camera as a viewer.