I have a Fire tablet. I put in a SD card a long time ago and was working just fine until this week. I get a message saying SD card not inserted , but the apps I put on it are all working just fine. If I take the SD card out those apps then do not show on home page. If I put it back in, the apps are there and work.Amazon techs couldn't figure it out. Told me to take SD card out turn it upside down and with metal pins facing me put it back in. Crazy cuz it didn't go in and I wouldn't force it.