As a fallback, record to local SD card *only* when connection to H500 is lost. When connection to H500 is back up, sync the footage in the SD card to the H500. The SD card should only be used as a buffer. There's a chance this is already the existing behavior, I need to test it.

Note that this is not the same feature request as https://community.tp-link.com/en/smart-home/forum/topic/841268?replyId=1639320 

I don't want an always recording to SD and the H500 option. High quality SD cards are expensive when you have to buy 10 of them. I would like to buy a cheap and low capacity SD card that is used *only* as a backup. If it is always recording to the SD card it will break fast