You are running "KitKat", however you need to be running "Marshmallow" to be able to move apps to the SD card and run them from there. If you can upgrade the tablet to "Marshmallow" then you 'may' be able to get it to work. I say 'may' because some manufacturers have restricted this option on their devices.
How to turn external SD card into internal storage on "Marshmallow".
NOTE: Please be sure you start with a blank SD card. It needs to be blank because when the card is converted to "Internal" storage, it will be formatted (wiped) and encoded (making the cards data only readable by that device).
1. Go to device “Settings”, then select “Storage”.
2. Select your "SD Card", then tap the “three-dot menu“ (top-right), now select...