Do you have pci-e slots?
I had to decide between a M.2 enclosure and a PCIe card. Since I plan to build a new system (with more M.2 slots) I will have more slots in the future. And maybe I will not like the M.2 enclosure and return it. wink
Then you’d better install it from scratch and have a clean, shiny and new system.
You know how it is, I just got my system right. Of course lots of settings can just be duplicated, but I would prefer not to set up some systemd services, cron jobs, etc. again.
I actually asked in the TrueNAS forum about this idea. According to some knowledgeable users this might work. For anyone interested, details here. The next major release (planned for end of October), should make this easier.