Just got a new SDS 200. Love it BUT........I keep getting SD card errors turning it into a expensive paper weight. I used it for weeks with no issues until for unknown reasons it started giving SD card read access errors, but would clear turning power on and off a few times till it loaded, I pulled card reformated it and "cleared user data" with sentinel software. I uploaded the newest firmware and files. When I plug it in it starts to up load firmware foe a sec then screen reads SD card access failed. Is the SD card bad? Thoughts? How do I get this resolved?