In my camera i currently run a samsung pro endurance 256gb sdcard, I ran it for about 2 months with no hiccups until the other day the camera said the card was too slow. I got the card sent off to samsung and they sent a brand new one but as soon as I put the new sdcard into the camera and formatted it and started recording, about an hour later it started saying that the brand new card was also now "too slow". I know they dont technically recommend this specific sd card even though their specs are virtually identical from what i can tell, but surely the card cant be too slow after just an hour of recording so im wondering is it really worth buying one off their "recommended" list such as the SanDisk max endurance one or if it sounds like a camera issue or something.