Okay, i've had my lg optimus f3 for about 2 years now and i've only used it for youtube, emails etc. Except now I have been trying to get some games but it just says "there is insufficient space on this device" my system memory is full, but my internal memory is empty, i've tried to move my apps to the internal memory but the option in the settings menu is greyed out and unselectable? Someone please help me, it's been bugging me for months now... ;(