You could have written two hours earlier, because that's when I bought the 512 GB microsd card. 🙁 Unfortunately, the dashcam formats, but immediately freezes when I try to record. I tried shrinking the partition to 250 GB, but to no avail. 🙁 Do you know of a program that will "reduce" the capacity of a micro-SD card? It's like they make fake drives—supposedly 128 GB, but actually 16 GB. I want do 512->256 GB.