I usually sync my iPad photos, music, videos etc with iTunes to keep it up to date. I remember when I did it for the first time, I had around 4000+ items that I have synchronized successfully without any issues. But recently when I tried the same thing, it is taking a lot of time for just 400 items. It says me that it is optimizing 349 photos. Can you tell me why it has to optimize those 349 photos which has already been optimized? And why does this process so long to finish?