1. Clear the cache
Many Android apps use stored or cached data to give you a better user experience. Cached data can save a little time, but the files stored in app caches are for convenience and are not strictly necessary. If you need to clear up space on your phone quickly, the app cache is the first place you should look.
How to clear cache?
Follow Below Instruction To Clear Cache…
Goto Settings>App Manager
You will see the list of installed apps as below..
Select any one app
App details will seen in new window..
Click on Clear Data and Clear cache
2. Move Apps to the SD Card
Another way to free space is to Move installed apps to your SD Card..
Lets see the procedure….
Goto Settings>App Manager or Apps (In some smartphones)
You will see the all app which you have installed on your phone
Select Any One App
You will get the app details window
Click on Move To SD
Done.. App will move from Internal Storage To SD Card and you will free that App size from Internal storage.