I have been having problems lately with storage on my Acer tablet. Specifically, my email would not sync because it said I had no storage space. But if I look at Storage under settings it says I have 12.5 GB of internal storage. If I add up the 5 items it lists, Apps, Pictures, Audio, Downloads and Misc it comes to approximately 750 MB. But it only lists 488MB as available. What is using all my internal storage?