Unable to recognize SD card


#1
  1. To confirm whether the SD card is licensed, if it is parallel imports, or fakes, it may not be identified.

  2. Check whether the SD card is all inserted correctly into the SD card slot.

  3. Replace other SD card to see if it can be identified, or use the SD card on other devices to determine whether the SD card itself is damaged;

  4. If the above confirmation is correct, the device must be returned to the company for overhaul.