How to fix insufficient storage available error in Android

lets get down to business. There are three steps to do this:
Step
1: Free up internal memory
* Launch file manager
* Open phone storage
* Delete unneeded files and make at least 1 GB free
Step 2: Set default install location to SD card
* Open Settings
* Select Storage
* Set ‘Default Write Disk’ to SD Card
Step 3: Clear cache

Source: How to fix insufficient storage available error in Android