I took about 200pics today.
My pics should be up to about 5000. Anyway, I found in my SD card:
Wierd, why 3 folders?
Inside, my pic starts at 6pm at DSC_9949! How did it jump there?
It rolls over, then if I go by timestamp you have DSC_0001-45 from 7.23-7.35
Then DSC_0021-50 from 7.36-7.44
Then DSC_0051-2xx from 7.44-9
As you can see the range 21-45 overlaps. Yes, there are pics that I now can't put in the same folder because it went crazy.
What's the deal here? I had this once on my D80, where I swear it jumped from 2000 to 8000.
custom a7 is ON
Note it had the same lens on (70-300) until file 54 when I changed to 17-50.