I have been taking pictures during my daughter's educational when all of a sudden, it hangs and doesnt act normal. I tried cleaning and optimizing and I can take pictures again. But after that, when I opened my gallery, no pictures were there, though when I take pictures, i see them at the lower part tab that the ones i am taking are being saved. Now, i dont know what to do. Those are memories that I intend to keep. So lame!