# I Built a Real 3-2-1 Backup System with TrueNAS, Offsite Replication, and UNAS

DevFeed: [I Built a Real 3-2-1 Backup System with TrueNAS, Offsite Replication, and UNAS](<https://devfeed.tech/articles/i-built-a-real-3-2-1-backup-system-with-truenas-offsite-replication-and-unas-10502.md>)

Original publisher: [Read original article](<https://technotim.com/posts/321-backup/>)

Author: Techno Tim

Published: 2026-04-12T13:00:00Z

Content type: tutorial

Language: en

Sources: [Techno Tim](<https://devfeed.tech/sources/techno-tim.md>)

Topics: [truenas](<https://devfeed.tech/topics/truenas.md>), [Homelab](<https://devfeed.tech/topics/homelab.md>), [Replication](<https://devfeed.tech/topics/replication.md>), [Server](<https://devfeed.tech/topics/server.md>)

Tags: [backup](<https://devfeed.tech/tags/backup.md>), [homelab](<https://devfeed.tech/tags/homelab.md>), [nas](<https://devfeed.tech/tags/nas.md>), [offsite](<https://devfeed.tech/tags/offsite.md>), [replication](<https://devfeed.tech/tags/replication.md>), [truenas](<https://devfeed.tech/tags/truenas.md>)

## AI overview

A homelab operator describes building a 3-2-1 backup system for roughly 30 TB of data. The setup uses an offsite TrueNAS box, a redesigned main NAS, and a third copy on another platform to support simpler individual-file restores while avoiding ongoing cloud-backup costs.

## Source excerpt

What started as, "I just need a backup," turned into a full rebuild. I wanted a real 3-2-1 backup system for my homelab without signing up for a giant cloud bill to cover roughly 30TB of data. That ended up meaning an offsite TrueNAS box, a redesign of the main NAS, and eventually a third copy on a different platform so pulling back one file would not turn into a ZFS project. Watch the vide...