please help me

Solution
Well I believe that device comes with Android "KitKat" which cannot make the change in the SD card to "Internal" storage, which is needed for apps to be on the card. Now if you can somehow upgrade the OS to "Marshmallow" then you might be able to make it work. Here are the instructions on how to change the card to accept apps, but again, it requires "Marshmallow".

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"...
Well I believe that device comes with Android "KitKat" which cannot make the change in the SD card to "Internal" storage, which is needed for apps to be on the card. Now if you can somehow upgrade the OS to "Marshmallow" then you might be able to make it work. Here are the instructions on how to change the card to accept apps, but again, it requires "Marshmallow".

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 “Settings” from in there.
3. Now select “Format as internal”, and then “Erase & Format”.
4. Your SD Card will now be formatted as internal storage.
5. Reboot your phone.

NOTE: If you don't reboot the phone, many things may not work correctly, so make sure you do.
 
Solution