So I have been unlocked/rooted for some time but am finally getting around to installing my first custom ROM on the nexus. CM9 RC1 just came out so I figured I would give it a go. Now what I did with my Droid (and what most guides say for nexus) is to factory reset and wipe cache (including dalvik). My main concern is everything that is stored on my phone (book, music, etc). With the D1, I stored all that stuff on the sd card...nexus doesn't have one. Will the factory reset wipe all that stuff? Im thinking it would.
I backed up apps/data. Not worried about that. Just stuff that I dragged over to storage on my own.