I have been experiencing the same issue with my Samsung Tab 12.2 Pro. I replaced the SD card and it stopped. After a time, it started again. My battery life has shortned, even after replacing the battery with a new OEM Samsung battery. I wonder if there is a problem with the amount of data on the card. I have quite a few video video files on the card, however it is nowhere full. I only use Samsung SD cards. I am going to try another band to see if that fixes the problem. Unless I here of another fix, I will report my experience with the new card.