Default Formating phone

Hey guys

I wanted to know how to get my phone memory to be lower.

Every time I flash a new ROM and do a wipe my phone memory is always around 10gb of 16gb used.

Can't get it any lower and thats with removing all my pictures videos and music.

So can someone please tell me if there is a way to format the whole phone so thst there's more space. Thanks



Sent from my SGH-I747 using xda app-developers app
Rogers Samsung Galaxy SIII SGH-I747m - task650 JB 4.2.2