According to THIS
i am able to use the extra SD card to store apps:
Once a card has been formatted as internal storage, both your device internal storage and the card will show up as “device storage” under storage settings, and you will be able to move applications which were in internal storage to the card. Moving applications to the card can be done from application settings (Settings > Apps > select application > Change storage location)
Once a card has been formatted as internal storage, Play Store will install applications on either storage volume automatically, based on a set of rules provided by the application developer (you will be able to move applications from one volume to another)
The card i added has been configured for internal storage. When i look at the storage settings, it's showing zero apps using the card. All the apps are in the phone's storage and none seems movable to the card. What gives?