[Q] Insufficient storage after complete factory reset

Ok, so I had the classic insufficient storage problem, so I simply backedup the data I needed, then I did a full factory reset. When it rebooted, I started to download Instagram, and it worked fine, but that was it. All the app updates and new apps cant be downloaded because I still have insufficient storage. WTF??? I nade sure that I unchecked the "restore ny data" box before I did the reset. Whats also weird is I'm still rooted and Super User is still installed. Anyone know how to get rid of all this rubbish data? All I want to do is have it go back to the state it was in when I took it out of the box.

Thanks in advance!

CJ