OK, took the R7 (and the old 7DII as well) on a trip. In South Africa i took a slew of photos on game drives. I use the regular numbering system for files, but on one day things went just a bit strange.
OK, the usual system:
7M0A0001.jpg
7M0A0002.jpg
7M0A0003.jpg and so-on.
On one day, the files downloaded arrange themselves thusly:
Oh, and to make things even more confusing, the "0001.jpg" and the "0001_1.jpg" files were shot 13 minutes apart, and the _2 was an hour later than that. But the "0002.jpg" was shot in a burst with 0001.jpg.
What the heck button did I hit, or errant menu section did I hit to get that?
The day before had been normal, and the day after it went back to the normal numbering system.