You might have better luck next door in the FCPX Techniques forum https://forums.creativecow.net/fcpxtechnique
Generally speaking, I like to keep my original capture (P2 in my case) on a separate drive altogether. Then I save my project and event on another drive, often the system drive, and I import the footage. As that makes a folder storing footage, I add folders to that folder for things like SFX, Score, Foley, and so on, that I import using keywords. To me, it doesn’t make sense to create folders as keywords and drag and drop and rewrap and blah blah blah because that’s what X is very good at. There’s even an S_Ton of 3rd party apps that let you get the media out of X and into a plethora of other apps.
/* make sure you select the preference so the media is copied to the event not just aliased. Then you can unmount~dismount, whatever’s the right term, the original capture drive. You really really really don’t want to lose that data. */
I hope that makes sense. The nomenclature is all wonky-mcgee compared with Legacy terms.