A while ago bought a parallel imported Samsung Captivate Glide i927 running 2.3 Gingerbread, and its been awesome, except for a couple of problems.

The main problem I've been having with it, is the Storage. When I first got it, I installed a bunch of apps and such, and the phone soon said it was full, I tried clearing caches of apps, then installing them, till the phone was near empty, and the phone was still saying it was completely full. So I factory reset the phone, and sure enough, after a while, the phone said it was completely full. This time, I factory reset the phone, left it on my desk running, installed no other apps than the default one, didn't connect it to the internet, and left it there for several weeks. Sure enough, the phone said it was full. I've used apps like ES File Explorer to try and find out what's taking up the space, and it says System Data is taking up all the space. I decided to Flash it to try and sort it, so I flashed a clean copy of 4.0.4 ICS onto it, but to no avail, and the phone now says it is full. I've spent hours searching through Google but nothing came up. If anybody could give me some insight as to what I should do with it, that would be great.