I bought a 512 GB Samsung High Endurance SD Card last week. I formatted for exFAT and had the TeslaCam folder, but it didn't see it (not even to format it within the car). I'm not sure why it didn't work, as I know others have used > 2TB SSD drives, so the size was not an issue. My prior 128 GB High Endurance SD card worked fine. It wasn't a big deal, as it never gets fully anyway (HW3). Perhaps it is some limitation of my Hub.
I just moved the new 512 GB SD Card to my BlackVue dashcam, which works fine. I have a 4K dashcam in addition to the Tesla dashcam - it does a better job at picking out details like license plate text and uploads the video each day when I get home and connect to WiFi.