OK, I see that now, thanks. On my camera, that displays as two numbers, like 108-5678, and the manual says this is the "folder number - file number". I thought the reference was to the numbers below that, like "4/80", which the manual calls "displayed image number / total number of images". Of course these second numbers reset when you erase all images. My file number was about 10% lower than the shutter count. But if I change the file numbering setting from Continous to Auto Reset, it resets to 100-0001 when I erase all images, or format the card.