Normally the phone is 120GB internal storage and 30GB is in use, from what none knows ??? So here is a quick solution look for an app called SD Maid 2 /SE for older phones for new phones you can download SD maid 1 of which both will expire in 14 days...
The same phone I am using sometimes it will freeze and start pressing it self so a friend said I need a file from online to fix it and if I might ask what is that file???
Not at all go and look at your settings its what I thought too but I was wrong....but I belive seeing is beliving try it and come let's chat about it....
Battery not correctly installed or the batter in use is not from trusted manufacturer and they don't correspond change the battery and buy from Samsung and install from them mine is in cool mode I can play call of duty the hole day
