To reduce Internal Storage space, go to Market on your phone and download Shrink Storage. This app is designed to get rid of all the unwanted downloads and google files that seem to vanish in a file called (Other) This accumilates because Windows 8 has not solved this problem. Once Shrink storage is downloaded Click Fill Phone Storage and wait several minute, reboot phone and Click Clean Phone Storage - This should take off about 1.2GB of Data.