My SDS100 was working perfectly until it flashed on the screen "SD Card File Error. Use Sentinel "Clear User Data" operation to initialize SD Card." I took the SD card out of the scanner and put it into Sentinel. Windows couldn't access the SD card and was unable to format it. After multiple attempts to access the card I ended up buying a new one. After I put the new card in Sentinel, I followed the instructions on setting up the new card. However, after I put the card back into the scanner I got the same message. Any help is appreciated. Thanks