If losing your NAS data would be a catastrophic event (photos/docs), you should build a backup NAS and replicate your main NAS’s snapshots to it automatically on a recurring schedule.

1) Build a backup NAS

• Old PC + drives
• Install TrueNAS SCALE (bare metal recommended)
• Create pool (example: backup)

2) Ensure snapshots exist on the primary NAS

On primary TrueNAS:

• Data Protection → Periodic Snapshot Tasks

3) Configure replication (TrueNAS → TrueNAS)

High-level steps:

1. Set up SSH between primary and backup NAS
2. TrueNAS UI → Data Protection → Replication Tasks → Add
3. Select source datasets (photos, documents, etc.)
4. Select destination datasets on backup pool
5. Schedule (nightly/hourly)
6. Test and verify snapshots on destination

4) Consider an offsite copy

Replication protects against disk loss, but not fire/theft. Options:

• rotate an external drive
• encrypted cloud backup for irreplaceable data
• store a copy offsite

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