Unable to update Moto E 1st Gen

Non-techie requests help. I have the latest android update on my first gen moto E and can no longer update anything. I now get a message that i do not have enough memory. I have only factory installed apps. and have disabled all apps. not needed for basic phone use, have no photos or files saved. Can i factory reset to pre- update or ??? Thank You.

Start with clearing the cache

Clearing the Cache

Factory Reset will not undo the Lollipop upgrade.

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