It was working fine last night. This morning when I (maybe) transferred files, it didn't show the separate folders the way it usually does. I was just about to send some more files but decided to check storage first. When I did it said that there was no sd card. I have since rebooted three times, all with the same result. The A02s was acting up.last night in terms of charging. Could this have something to do with it? This morning it was at 93% after being plugged up before 11:00 pm, but later made it to 100. Now it's at 90.