My LG Optimus G is constantly getting massive slow-downs where I need to hold down the power button to restart it. There is also a ton of space being used even though I have only used 14.5 GB (No where near the 25.04 GB it says it has in total...) according to the storage analyzer. However, it says there is only 777 MB available. Therefore there is stuff in the root directory that is filling up the phone.