Default [Q] Lost Storage after Upgrade

Hey,

So I'm having some issues that I'm sure are happening to other people. Don't ask why I'm just bringing it up now, but anyway....

I updated to KK by using the methods on here before KK was released for the Note 3 OTA.

I'm running:

Android: 4.4.2
Baseband Version: N900VVRUCNC2
Kernel Version: 3.4.0 dpi@SWDD5521#1
Build Number: BigginsROM V4.5 NC2
SE for Android Status enforcing: SEPF_SM-N900V_4.4.2_0011
Thu Mar 13 21:15:03 2014

So my problem is that ever since I updated to KK, I've lost about 30gb of space on my internal storage. I have a 32gb external SD, so it's not really a problem, but whenever I go to install an app, it says I only have 433.9MB left. What's taking up all this storage and how do I fix it??

Thanks!