Could be a configuration issue e.g if settings were put back to their default during the update? If this is the case you should be able to change the SD settings. Or it could be a corrupted SD card, which would need to be reformatted. You can probably check if your SD card is ok by going into My files and check if you can see and open any files on your SD card which should tell you if your SD card is ok or not. Hope this helps
