I just noticed that my file names start back at C0001 after i reformat my SD card which is causing me issues now as i download those new files to my mac since those file numbers already exist. I've done some research and confirmed my File number settings in menu 5 page 6/7 is set to Series. The good old Google has told me this is a known bug and is not being fixed (goes back to 2017) but i find that hard to believe. Does anybody have this same issue and if so what is the work around to fix it?