Try the card in another device. If it works in that, then there may be a problem with the slot on your device and you should have it looked at. However, if the card doesn't work in any other device either, then the card is bad.
Try the card in another device. If it works in that, then there may be a problem with the slot on your device and you should have it looked at. However, if the card doesn't work in any other device either, then the card is bad.