Select your 'SD Card', then tap the “three-dot menu“ (top-right), now select “Settings” from in there.Go to device “Settings”, then select “Storage”.

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). NOTE: Please be sure you start with a blank SD card. How to turn the 'External' SD card into 'Internal' storage on 'Marshmallow' a.k.a. If either of these is the case, you will not be able to use this information. NOTE: If any of the steps are missing on your tablet, or they don't work for you, then you have a tablet that either has an older Android version or has been restricted by the manufacturer. And third, you need a tablet that has not been restricted by the manufacturer from making this change, which does happen. Second, you will need the instructions I am including below. First, you need to be using a tablet that is running at least Android 'Marshmallow' (or newer) or be able to upgrade to it.

How to format sd card on galaxy s7