HTC One X SD storage issue ~ 11 GB gone

Err… I found another HTC One X issue. Why HTC One X has so many issues? HTC One X has 26 GB SD storage which can be accessed by user. However, there is one serious bug that causing more than 10 GB storage is gone. Some said that 1.29.401.11 software update (Europe) fixed this SD storage bug. But my HTC One X (Asia) yet to receive this update. And I am suffering 11 GB SD storage lesser now…

HTC One X SD storage issue

11 GB of System data. What is that? Can anyone tell me how to solve this HTC One X SD storage issue without format it? Lazy to do so every day. When will 1.29 software update in Asia arrive?