I tried to rename root's .ogg files on my Samsung Note 9(Oreo) and unable to do it. I found limited information here. I can rename the .ogg files in the older Android though.. What I have tried so far from these app and failed;
1. ES explorer
2. root explorer
4. total commander
Permission for "RW" only can set on "mixploer", and "root explorer" but after tried to copy over the root folder, it prompted failed to copy. Although I can set ES exploere to "RW" mode but it fools you to believe it has rename the file but in reality it was unable to, what a screw up.. Anyone has successfully rename files in root folders?
I did not try this in "safe mode" though..