he he he, yeah, a very noob, don't worry, that is the file which holds all the keys used for encryption of the different parts of the console's software. you need extract it from your own console, because sharing it is a felony (they are ninti copyrighted material)
the best way to extract them is running the payload LOCKPICK_RCM but the github for that software is DCMA'd so you need to use a web searcher to find the latest version and then run on your own console.