I panicked, a little bit.
They weren’t the most important photos and footage, but it wasn't easy to take them. I’d woken up at 5am and hiked (there’s no other way to describe walking in San Francisco) with two tripods and two big cameras and lenses on my back, while gaining almost 700 feet of elevation.
That’s why I was a little upset to find a cryptic “A7IV_3902.RSV” with zero bytes on the memory card, instead of the photos and videos I had made.
So it does happen, after all: memory cards get corrupted, or something like that.
After more than 3 years using a camera with dual memory card slots, I was about to find out if the feature was worth it. I inserted the second memory card into the laptop, and to my huge relief, there they were. All the photos and videos I had worked hard to make. Phew.