I recently bought 3 C310 cameras and installed one last week overlooking my garden.  Set-up went fine, formatted SD card and everything working well to start with.  2 days later, I checked on a notification to find SD card was prompting me to format it again and nothing had been recorded.  I formatted it and everything started working OK.  Today, same issue, nothing recorded and card showing as unformatted.  Its a brand new PNY card, 64GB and set on loop record.  When I format it the status shows as "Good" in the settings.

I bought these cameras specifically for the SD card recording option as don't want to sign up for Cloud storage on 3 cameras (1 is currently on the 30 day free trial but I will add a card before this expires).  Please could someone advise what the issue is and how to fix as currently camera is not fit for purpose as cannot rely on recordings being made.

Thank you