How To Use SD Card Memory As Internal Memory To Put OBB Files In SD Card

ROOT is required. Without it, the app will not launch.

Today some apps store big files over the internal SD card (e.g. games, podcasts, offline RSS content, pictures, videos, offline navigation software). 

Typically users have a small internal sd card size (~16GB) while the external SD is a lot bigger (~32-64GB). 
Most of these apps users download from the Play Store save their application data in the internal sdcard by default and don't have an option to use the external SD card to store data so they starve your internal SD card memory.
 FolderMount is the solution to this issue. 
This app has the ability to link folders in your internal sdcard to folders in your external sdcard thereby populating the internal sdcard folders with content that really exists in the external card. 
This helps us free space and have multiple games/apps with big data stored simultaneously without the need to uninstall. 
DOWNLOAD FOLDERMOUNT HERE