Truenas stuck on GNU Screen / Wont Boot

I know SCALE has this capability. Data Protection → Cloud Sync Tasks.
Unfortunately I have little to no experience with CORE so couldn’t say.

Again, SCALE instructions, though I think this is the same on CORE.
System Settings → General → Manage Configuration → Download File

There is also @joeschmuck’s excellent Multi-Report script linked above that can automate this along with various other excellent status reports.

Here’s an excellent basic primer on snapshots from @winnielinnie . Whether or not you want to delete them is up to you. I have a daily scheduled snapshot task and I store them for two weeks.