Disable USB charge!

> I just tried and found that you need to modify a file: > > sys/class/power_supply/usb/device/charge > > its default content is 1 which means 'enable charging' you need to set it to 0 to 'disable charging' > > $ su > $ echo 0 > /sys/class/power_supply/usb/device/charge > > I tested on Nexus 4 and it's working successfully. user3395818 has posted this answer. I have Nokia 3 and it comes with Android 7 Nougat. I am new to Android. How to perform the above task? Please explain in detail with steps.