Samsung Galaxy Note8 (SM-N950X) Firmware Overview
The archive lists 3 official builds for the Samsung Galaxy Note8 across 1 region (CSC). The newest one is N950XXXU1AQH6_LLK, released August 11, 2017 with Android 7.1.1.
How to Flash SM-N950X Firmware
Put the Samsung Galaxy Note8 into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with the same or a higher Bit than the one installed — a lower bootloader binary will be rejected.