3850 STACK switch IOS Upgrade/Downgrade

This video will show you step by step process to upgrade or downgrade 3850 stack switch.

[@user-kd6mn4pn8k]

what does this mean:
Switch 1
---------------------------
Current Boot Variables:
BOOT variable does not exist
Boot Variables on next reload:
BOOT variable = flash:packages.conf
Manual Boot = no
Enable Break = no
Boot Mode = DEVICE
iPXE Timeout = 0
?

[@Boss9403J]

Hi bro
I am going to upgrade 9200L 4 switches in stack
Is it same process

[@ashutoshshukla2034]

could you comment of troubleshooting two swtich stack 3850 and ip mac binding in switch stack

[@norfauzannaim4878]

What are you trying to do with these stack switches?