there is a short back up restore process to follow
HexOS deck > Settings > TrueNAS
In the truenas ui of original ssd.
systems tab on left side of screen
advanced settings from the systems menu
click on manage configuration
download configuration
What to do with new ssd
install hexos
during the claiming process when asked if hexos should configure your storage drives, use the skip button
in the truenas ui go back to manage configuration in advanced settings
upload the config file from system 1
go to storage tab in truenas ui
select import pool and follow the prompts.