I'm trying to upgrade my sd to 64gb and I keep noticing that I have a notification that the card has unmounted. I'm pretty sure when I first put the card in that in clicked into place but now it will not stay in. The obvious solution to me would be that I have damaged something in the slot that clicks and holds the card in place or perhaps It wasn't locked in place to start with. But I've tried another card and it won't click into place either and unfortunately the old card has been misplaced so I can't even check and see if that will fit. Has anyone else experienced this?