I don't know if anyone still needs this issue truly answered , there Are too many responses for me to read them all. The problem the original paintif has is that the internal memory is small compared to his ad card. Depending on which version of Android being run on that persons optimus is that settings need to be told to store to the sd card instead of internal memory. Plus reduce the amount of apps downloaded. All non essential and unused or rarely used apps should be uninstalled. This the answer the the paintif's problem. Any other questions or problems you can contact me at 6ya.com . Phil