odd GoPro file name defaults

[rans6andrew]

I have been using a GoPro7 for a few months for both stills and MP4 activities. I only just got to download all of my endeavours and notice that the file names are not consistent. Some of the photos are "Gxxxxxxx.jpg" and others are GOPRxxxx.jpg". The only difference I can see from the directory listing after copying to a Linux Mint desktop computer is that the "G" suffix files are all 2.4MB and the "GOPR" suffix files are all bigger than that. The times/dates are intermingled.

All of the MP4 files are "GH" suffix.

I have not messed with the camera settings knowingly so what is going on with the filenames?

Anyone?

Thanks,

Rans6.......................