Formatting Internal SD

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http://forums.androidcentral.com – I've been using a ROM on my ATT Galaxy S3 that has been acting weird; maps force closing, black screens constantly, apps freezing for extended periods of time, and I want to start fresh. I'm going on a road trip for the holidays and would really like to use maps as they were intended. I wiped all my personal data but there are still some pictures showing up in gallery and some app folders that didn't get deleted. My understanding is that this is all on the internal SD card. I know I shouldn't have to worry about it too much, it'll just make me feel better. Is the ROM itself (AOKP 4.1.2) on (HowTos)