How do I fix a SD card cause its keep saying it's damage and I never spilt water or dropped it. How do I fix it without getting a new one?

You may have to turn your phone off, take the card out, turn the phone back on and then put the card back in and see if anything shows up. Sometimes SD cards mess up and ERASE everything on there. If it won't show up at all, that may be what it did. Also, if the card was in a different phone it is possible that the pictures, music and videos may not be able to adapt to the new phone. So you either get the stuff of the SD card and then put it back in or go to your phones Card Memory and format the card (which will delete everything)