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 time after that you need SD Maid Pro of which I think its very low cost compared to the work done its super easy to use and all are in Samsung app or the play store.
I hope I was able to help clearing your storage today cheers 😎😎😎
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....
You need to remember that we never really have access to the full storage space, for example a 16gb USB only around 14.8 is 'usable'. On a 1TB hard drive, around 980gb is accessible.
Samsung combined the around 20gb the operating system files with the 'unusable' storage space under system until recently when there was a whole user panic about it until they update the system to now say 17gb instead of the 30+
