The camera does not recognise the SD card.

Reason:

1. SD card is not initialised
2. SD card is faulty
3. SD card slot is damaged

Solution:

1. Insert the SD card into the SD card slot, format the SD card with the Yale View app.
2. Try the SD card on PC/smartphone/other devices, check whether the SD card is damaged. If it is a bad SD card, please try another one.