Hello,
I have a 5D Mark IV and with a SanDisk 256GB Extreme Pro SD card. After filling the card with photos and videos, I formatted it both through Windows and the camera body, so it ideally should behave like an empty card. However, when recording videos, the camera will stop after about 20 or so seconds of recording as if the card is getting full.
I understand vaguely that the card will still retain files even after they're deleted, so this must be what's prompting the camera to think the card is full. What should I try to do? I've formatted the card several times without avail.
