some cards just aren’t made for continuous read/writes. many of sandisks actually list security cameras as a cause for voiding their warranty.
when you get a minute check this topic out, we are trying to gather a list of good and “bad” cards for our cameras.
make sure when you buy cards, buy “endurance” cards that are made for things like our cameras or dash cams that do continuous reads and writes, they will withstand what our cameras will put them through