Hello martinr and everyone,
1) @thelonelycoder :
KIT : keep in touch
BR : Best Regards
FB : fot my name and surname
2) I am on the L&LD’s guide:
I don't understand "custom settings to the jffs partition". Is it the same thing as "backup cfg file" ?
One such item that comes to mind are OpenVPN certificates and keys. They’re stored in jffs. I got the impression you are setting up the router from scratch so you don’t have OpenVPN set up or anything else for that matter so your jffs will not need backing up.