Help

I need help, currently my os is the jellybean version. All along my fone always have lots of apps running behind til I reduce to 6-8 apps. But lately I try to update apps, it prompt me insufficient memory. I tried my ways to stop apps to run but still can't. I check my device memory is only 202mb. Usbstorage got 7.52gb. May I ask wat is the root problem. I really wanted to do a hard reset to factory setting. Anyways can help...

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