Then choose “Recovery”. This will reboot you into TWRP recovery.
Step 16. Once in TWRP, swipe right again to allow modifications.
Step 17. Go to your computer and copy over the SuperSU and no-verify-opt-encrypt.zip files to the internal storage of your Note 5.
Step 18. Next choose “Install”.
Then choose “no-verify-opt-encrypt.zip”.
And swipe to install.
Step 19. Choose “Install” again.
Then choose the SuperSU zip file.
And swipe to flash.
Step 20. When that’s done, tap on “Reboot System” to reboot phone.
Step 21. Once rebooted, sign in and you will find a new app called “SuperSU” in your app drawer. Tap on it to open the app.
Step 22. If you don’t see any errors, you have successfully rooted your Galaxy Note 5!
You can verify you have 100% full root by installing a rooted app like Titanium Backup app from the Play Store. You should see a Superuser request window pop up like below: