That's the thing, I don't use OFW. So its content is basically nothing, just like your Switch first start or after a factory reset.
My emuNand is based on this state for a clean start, but then contains a lot of data (games, saves, profile, homebrews, pictures...)
I am interested in knowing where are located the interesting data in my emuNand so that I can restore them after updating OFW by OTA, deleting current emuNand, dumping SysNand and creating new emuNand with updated FW.
From what I understood, it is the cleanest way to update Nintendo FW on emuNand.