I have absolutely no idea.

Usually this file is made available easily in these kind of apps for noobs (that I am btw) directly in the settings with some kinds of warning or something.

Here I have nothing, this is why I try to understand  how it works before using it more extensively.

I asked nostr:npub1xv8mzscll8vvy5rsdw7dcqtd2j268a6yupr6gzqh86f2ulhy9kkqmclk3x  in an other note to explain it, hope he will see it.