Samsung galaxy internal memory

Solution
Actually, not all devices have the option. You have to both have the right version of Android and have a device that the manufacturer hasn't removed this option on. Which, sadly, does happen. So if the three dots aren't there, and you have the right Android version, then it was restricted. However, if you have any version of Android older than Marshmallow (6.0) then it wouldn't have the option.
Actually, not all devices have the option. You have to both have the right version of Android and have a device that the manufacturer hasn't removed this option on. Which, sadly, does happen. So if the three dots aren't there, and you have the right Android version, then it was restricted. However, if you have any version of Android older than Marshmallow (6.0) then it wouldn't have the option.
 
Solution