How to Build a Home NAS with TrueNAS (2026)
A NAS (network-attached storage) is the backbone of a homelab: central storage for backups, documents, and your media library, accessible from every device. Building your own with free TrueNAS gives you more capacity and control than any off-the-shelf box for the money. Here's how.
1. Choose drives first
Drives matter most. Use CMR NAS hard drives (WD Red Plus, IronWolf) — never SMR — and buy them in a couple of separate orders so they're from different batches. Plan your capacity with one or two drives of redundancy in mind.
2. Pick a case & board
A compact NAS case like a Jonsbo N-series fits several hot-swap bays in a small footprint. Pair it with a low-power board and enough RAM — ECC is a nice-to-have for ZFS if your platform supports it.
3. Install TrueNAS
Write the TrueNAS SCALE installer to a USB stick, boot from it, and install TrueNAS to a small boot SSD (keep your data drives separate). After install, manage everything from the web UI in your browser.
4. Create your storage pool
In TrueNAS, create a ZFS pool from your data drives with redundancy (mirror or RAIDZ), then create datasets and SMB/NFS shares. ZFS gives you checksums, snapshots, and self-healing — far safer than a plain drive.
5. Connect & protect
Map the share on your PCs, point your backups at it, and follow the 3-2-1 rule with an off-site copy. A faster network link (see our 2.5/10GbE switch and NIC guides) makes large transfers painless, and a UPS protects against corruption during outages.
What you'll need
NAS drives, a NAS case, RAM, and a UPS — or grab a ready-made unit from our NAS for Plex & Jellyfin guide.
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