Correct. The recovery file is the custom recovery.
There are two main types of custom recoveries.
- CWM, ClockWorkMod, which comes in a touch format or a format you need to use your power button, up/down volume keys to navigate.
- Or TWRP, Team Win Recovery Project To start with use TWRP, I think it is the easier of the two to use.
You have the steps correct.
1. Flash the TWRP custom recovery file in ODIN. (same method you attempted with the CF-AUTO-Root)
2. Reboot into recovery.
Power off phone.
Wait a minute and turn it back on. To boot into TWRP recovery (HOLD VOL UP+HOME+POWER) while it is powering on. Do this quickly after turning phone on, within seconds of powering on.
3. You'll see a screen that says Team Win Recovery Project at the top with about six grey buttons on a black background
Click install.
Upon hitting Install, you’re presented with the files and folders on your phone’s storage, from which you can select the file you want to flash. Find the UPDATE-SuperSU-v1.93.zip.
With the file selected, you can swipe the slider to confirm and start flashing the selected file.
4. Once the flashing process is complete, TWRP gives you some handy options for quick access to certain tasks that many users would need to perform after flashing, eliminating the extra steps required to pick them from their individual sections. These include wiping cache and dalvik cache, and rebooting the system, in addition to a Home shortcut.
Click reboot. Then go to SuperSU app and test it.