I’m gonna go with Lanny on this one - something changed. I have 64GB cards in all of mine. There are a couple that the image almost never changes, and as a result, I can get over two weeks on those cameras. I did not check all of my cameras, but every one goes back to sometime between 1200 and 1900 on 27 Jan. I am watching one of those right now. It’s essentially a pitch black non-changing image and showing a data rate between 125 and 200 KB/s (in HD). That is a change. This particular camera is firmware 184.108.40.206 (RTSP firmware), and app version 2.17.7 on an Android.