How to move apps from internal to sd card in lg stylus 2?

Solution
Well, first you have to be running (or able to upgrade to) at least Android "Marshmallow" or newer. Second you have to have a device that hasn't been restricted by the manufacturer. And third, you have to have the instructions I am including below.

NOTE: If any of the options in the instructions is not on your device, or it won't allow the changes even when running the right version of Android, then the manufacturer has restricted the option on that device.


How to turn the "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...
Well, first you have to be running (or able to upgrade to) at least Android "Marshmallow" or newer. Second you have to have a device that hasn't been restricted by the manufacturer. And third, you have to have the instructions I am including below.

NOTE: If any of the options in the instructions is not on your device, or it won't allow the changes even when running the right version of Android, then the manufacturer has restricted the option on that device.


How to turn the "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.


How to turn the "External" SD card into "Internal" storage on "Nougat".

IMPORTANT NOTE: Be sure you start with a blank SD card. When the card is converted to "Internal" storage, it will be formatted (wiped) and encoded (making the cards data only readable by that device), so anything on it prior would be gone.

1. Go to "Settings", and then select "Storage & USB".
2. At the bottom of the list you should see the SD card's details, including the option to format it and make it "Internal" storage.
3. Once this is done, reboot the device and you can start running things from the card.

If you don't reboot the phone, some things may not work correctly, so make sure you do the reboot.

 
Solution