Beginner - TrueNAS Setup on used SuperMicro X10SDV-6C+-TLN4F Board

Re 1:
A bit strange … The Page shows 2.6 , but filename & contents are named 2.5

Re 2:
If/when i’ll use the 10G , it will be at 10G

Re 3:
I have actually considered to make this, the backup box.
If it draws close to 80…100w the cost of 24/7/365 would be quite high in DK.

I’m maybe considering it to be “just turned on”, at select times to make backups.
Maybe even just weekly …
I’d expect that WOL would turn it on, and then last backup would “shutdown the machine” …

How do you guyzz make backup of 32TB ???
Well … I’m prob. not going to have 32TB on the NAS for a while.
Guesstimate would be 4TB growing to 8

I’m a home user (Wife & I) … Wouldn’t want to go crazy on $$ or electricity.
Daily (important) changes would mostly be e-mails (own server) , and at times pictures.

Other systems are quite static …
Zabbix , Pi-Hole etc.