Samsung Galaxy Note8 (SM-N950X) Firmware Overview
What is the latest SM-N950X firmware?
N950XXXU1AQH6_LLK, released August 11, 2017 with Android 7.1.1. The archive holds 3 official builds across 1 region (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy Note8 still getting updates?
Most likely not: there has been no new firmware since August 2017, so Android 7.1.1 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
All SM-N950X firmware builds
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. Use HOME_CSC to keep your data, CSC for a full wipe.