Is my SD card busted?
Emil! Believe it or not, it's not the problem of your SD card,but your phone. In fact, the crash of our SD cards is not common. Generally speaking, lots of phones have difficulty in loading large memory SD cards. So when you make some abnormal operations, your phone will pop up some warning information. But at this moment, you should stay calm and you shouldn't consent its requirement, or it can not recognize your SD any more. Therefore, you'd better shut down your phone and power on it again. If the phone screen pops up "SD card is blank or has unsupported filesystems", you just tap"No".