Most of the cases this is not a CERTIFICATE problem-
if you go to your file explorer and look for the PROGRAM FILES directory you will be surprise -
actually this happens when you install cabs on the storage card - those apps write temp files all the time - so when you take out your SD card - those apps continue writing this temp files -
in the bottom line = go to your device and rename the FOLDER storage card to storage old -
now you will see the icon for your SD CARD next to the name STORAGE CARD 2-
the last thing is to remove the SD CARD an re insert it again - now you will see that it return to its original name (STORAGE CARD) .