I'm not quite understanding what your wanting to achieve @Herouk
If your running out of storage internally on the phone then use the optomise option in your phone's device care section and use > Clear Cache Files from the phone's System Partition Section > https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to insert your earphones or hook upto a powered On Laptop to access the Clear Partition Section. This may help with lag or stutters as this clears the phone of old/unused or broken cache files.There is also a Repair Apps option in the Menu System too.
Delete any rarely and no longer used items such as apps , texts , pictures and videos , calendar entries and tones etc.
I wish you all the best. 
