ROM Hack Question trying to identify file extracted from switch game backup

[XDM]

so i am trying to explore a switch backup and came across some unidentifiable files with no header information
the files that accompany it are these
.nrr (Folder)
re.v
and the file in question a file simply called 42, 2gb, the file i want to explore

some of the header looks like this

CRA.....ö...PÑ...G......ýU..`5ƒ.S.......–U..P4K.³MŽ.....nP..Àý‘..‚Ù......J..Ðÿ..Ã.k.....RR... 9.“.|.....pH..`hÌ.£Ÿµ.....»D..àD....‚.....ÃV..Йà.ãL‰.....ÈH...5Ö.³æi.....@J.. ò¼.Ã.@.....ÙV..`...

i have the switch toolkit but i have no idea how to even begin dealing with the file

 

[MurraySkull]

Mario Golf: Super Rush, right? I also wish to get into that file so as to extract the soundtrack.

 

[Fawfulthegreat]

Based on my search leading me to this thread it seems like this is the first game to have a file like this- and worse, it looks like this file contains all the assets to rip. Hoping someone can crack it open.

 

[XDM]

perhaps maybe a way of pulling files out POST process from the ram (like how ninja ripper does on pc) im assuming this file is a encryption like how smash bros had that one encrypted file for the longest. now if the switch hardware treats this like a archive maybe once its loaded to the ram maybe its decrypted and loaded making it possible to pull it maybe...

while hex diving i can see some familiar file extensions .ARC Files but i dont knoe where one file ends and the next begins