You can back files up usually a wide variety of ways that means they won't be lost @thedarksideofHassan
Hook up to a computer and use relevant software.
Dropbox or another online vault.
If your still hesitant you can go to a Samsung Experience Store or Samsung Service Centre who can take a look but they may flash the firmware too.
If your using a screen protector then consider removing it as a process of elimination.
Current Phone ~
Samsung Note 20 Ultra 5G SM-N9860_256Gb SnapDragon 865+
Samsung One Ui 3.1/ Android 11.