How to safely update freenas 11.3?

How to safely update freenas 11.3 ?

Good starting point : Guidance needed for FreeNAS-11.3-U5 to Latest TrueNAS upgrade. | TrueNAS Community

Use a Google search to access the legacy TrueNAS forum.
Save your Config and ensure you can fallback.

If you’re using encryption on your pool keep in mind that Geli-Encrypted pools have to remove the encryption before updating because geli encryption has been depreciated.

…or click the link at the top of every page in this forum for “Browse Forum Archive.” But if you want to search it anyway, of course, Google’s a good bet.