My SD card is completely ruined because of this device and yet I'm used it a dozen times. When I put my card in the camera, it does not fit very well, we had a little force (of course mildly) ..... but the card has not loved ... !! I bought another small device with Amazon (of same brand as my SD card (Tr .... d) and he does not damage the cards. In addition it also reads micro SD cards.