What happens to the settings?

I have to reset my PC and I have a question, go to my settings in Fortnite, too, do I have to reset them after the new installation so do I have my graphics etc.

If you can't find the right file where this is stored, everything will probably be gone.

I don't know the folders for any setups from Fortnite and can't help you with that. Possibly. Make a backup of the Fortnite folder where it was installed.