Mighty Rom 4.9.3- not enough memory for any apps

[secret222]

I have the 4.9.3 mighty rom aand the TF3D is hella fast and all but when i try to run games, they run supper laggy, youtube app wont load any videos, its says not enough meomry, and when i try to record video it says the same thing, not enough memory, why is that, do i need to change some settings.