I recently update my phone (SPHL710) S3 with ND8 and flashed a clockwork mod recovery. I still had about a quarter of my internal storage left around 4gb. I updated to a newer recovery and did a backup to the ext. SD card. I looked again at the amount of space on the internal storage and it is about 1gb. So I did a clean dalvik cache but ti didn't help. I just am trying to figure out what would take up 3gb of space in such a short time frame.