Samsung Galaxy S Advance GT-I9070 V4.1.2 CWM Clock Work Mod Recovery 

Hi,I had downgraded my galaxy s advance device to from jelly bean to gingerbird,its working fine but unfortunately my internal storage is reduced from 8gb to 4 Gb.I tried my device on formatting but still i am facing this issue.Suggest me

Samsung Galaxy S Advance GT-I9070 v4.1.2 CWM Clock Work Mod Recovery