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What File System Should You Use for a NAS?

Published: 24 juli 2026

Live answer · Amazon.com

Pulling live prices…

Live data across PricePerGig listings. Prices may change; Updated every few hours.

📊 Per 25 juli 2026 ligger en typisk NAS på Amazon.se på 1 505 kr/TB eller 1,505 kr/GB bland de 952 liveannonser vi följer, med störst utbud av enheter runt 743 kr/TB eller 0,743 kr/GB. De bästa erbjudandena på Amazon.se börjar runt 1 000 kr för 2TB (501 kr/TB), 1 346 kr för 4TB (337 kr/TB) och 331 kr för 6TB (55,1 kr/TB). Bästa prisvärdheten just nu är 6TB för cirka 55,1 kr per TB.

Sourced from real discussions on r/homelab, r/zfs and r/DataHoarder, cross-checked against live PricePerGig listings.

Building a NAS and stuck on the file system question? Let me make it painless.

For most people, the answer is ZFS. It is the gold standard for keeping data safe, and it is free.

If your platform pushes Btrfs, that is a solid choice too. Plain ext4 is fine only for simple single drive setups.

The table above shows the live price per TB on your marketplace for the drives that will sit under whichever file system you pick.

Why ZFS is the default pick

ZFS sounds intimidating. It is not, and it does something genuinely magic.

It checks every piece of data for silent corruption and quietly repairs it.

Hard drives occasionally flip bits without telling you. Over years, that rot can creep into photos and files. ZFS notices, and with redundancy it fixes the damage automatically. Your data stays exactly as you saved it.

On top of that you get instant snapshots, easy redundancy levels like RAIDZ, and rock solid stability. For anything you actually care about, that integrity checking is the killer feature.

It likes a bit more memory than other options, but on a modern NAS that is no big deal.

Where Btrfs fits

Btrfs is the friendly alternative, and it is genuinely good.

It offers similar perks, checksums for integrity, snapshots, and flexible volumes. Several popular prebuilt NAS units use it by default, and it works well there.

If your hardware or software steers you toward Btrfs, you are not missing out. It is a capable, modern choice. ZFS just has the longer track record and the bigger fan club for serious storage.

When plain ext4 is fine

Do not over engineer a simple setup.

If you are running a single drive holding stuff that is easily replaceable, ext4 is perfectly fine. It is simple, fast and battle tested.

The moment you add multiple drives and care about the data, though, you want the integrity checking and snapshots that ext4 simply does not have. That is the line where you step up to ZFS or Btrfs.

What actually matters more than the file system

A reality check before you agonise over this.

No file system saves you from a fire, a theft, or a fat fingered delete. Integrity checking is not a backup.

So whichever you pick, the real safety comes from redundancy plus an offsite backup. The file system protects against silent corruption. Backups protect against everything else.

The bottom line

For a home NAS, pick ZFS for the best blend of data integrity, snapshots and redundancy. Btrfs is a fine alternative, and ext4 is okay for simple single drive boxes.

Whichever you choose, buy good drives at the best price per TB on the live table above, run redundancy, and keep an offsite backup. The file system keeps your data honest, and the backups keep it alive when somthing goes wrong.

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