How much does a NAS cost is one of those questions with a frustrating answer: it depends, and the number on the box is rarely the number you pay. A NAS, or network-attached storage, is a small always-on server that holds your files and streams them to every device in the house. In 2026 the enclosure is only the first purchase. The drives, and sometimes a few extras, often cost more than the unit itself.
What changed in 2026
The good news is that entry-level NAS boxes have gotten cheaper and more capable. Faster processors, more memory, and 2.5-gigabit networking have trickled down into affordable two-bay units that used to be premium features.
The complicating news is drives. Hard drive prices per terabyte have kept sliding, but the large-capacity drives most people want for a NAS still represent the biggest chunk of the bill. So while the box got easier to afford, the total setup cost has stayed stubbornly middle-of-the-road. Treat every figure below as directional and check current prices yourself before you buy.
The three parts of the bill
Almost every NAS purchase breaks into three pieces, and skipping any of them leads to sticker shock later.
- The enclosure. The box with the processor, memory, and drive bays. Most ship diskless, meaning no storage inside.
- The drives. You buy these separately. Capacity, not the enclosure, usually drives the total cost.
- The extras. Optional but common: a UPS battery backup, extra memory, or a cache drive for speed.
That first point trips up newcomers constantly. A tempting enclosure price is only the entry fee.
Rough price tiers for 2026
| Tier |
What you get |
Rough total with drives |
| Budget two-bay |
Basic box, modest CPU, room for two drives |
Low hundreds |
| Mainstream two-bay |
Faster CPU, 2.5GbE, better apps |
Mid hundreds |
| Four-bay enthusiast |
More bays, more memory, redundancy headroom |
High hundreds to four figures |
| DIY from old PC |
Free software on hardware you own |
Cost of drives only |
These are ballpark bands, not quotes. The single biggest variable is how much storage you want, since drive prices scale almost linearly with capacity.
Prebuilt versus do-it-yourself
Prebuilt units from the big NAS brands are the easy path. You get a polished app ecosystem, mobile apps, and support. You pay for that convenience in the enclosure price.
DIY means installing free NAS software on a spare PC or a small mini-PC. The software is free, so your cost collapses to the drives plus whatever hardware you already own. The catch is time and comfort. You are the support desk, and setup can eat a weekend.
A fair rule of thumb: if you enjoy tinkering and have hardware lying around, DIY genuinely saves money. If you want it to just work, the prebuilt premium buys real peace of mind.
The costs nobody warns you about
- Redundancy is not free capacity. If you want a drive to be able to fail without losing data, some of your storage goes to protecting the rest. Two 8TB drives in a mirror give you 8TB usable, not 16TB.
- A NAS is not a backup. Redundancy protects against a dead drive, not against ransomware, theft, or an accidental delete. Budget for a second copy somewhere, ideally offsite.
- Power adds up. It runs 24/7. The draw is modest, but it is a recurring line on your electric bill.
- Drives wear out. Plan to replace one every few years. That is not a one-time purchase.
What to skip
- Oversized enclosures. A two-bay covers most homes for years. Do not pay for eight bays you will never populate.
- Enterprise-grade everything. Business features and top-tier CPUs are wasted on a household media library.
- The maximum drive size on day one. You can often add capacity later. Buy what you need now with a little headroom.
- Skipping a backup to afford more storage. A single copy on a NAS is one bad day from gone.
FAQ
What is the cheapest way to get a NAS?
Repurpose an old PC with free NAS software. Your only real cost becomes the drives, and you reuse hardware you already own.
Do I really need to buy drives separately?
Usually yes. Most NAS units ship diskless, so budget the drives as a separate and often larger line item.
Is a two-bay NAS enough?
For most homes, comfortably. Two bays allow a mirror for redundancy and plenty of capacity for photos, documents, and media.
Why does the total cost vary so much?
Storage capacity is the swing factor. The enclosure price is fairly stable, but drive costs scale with how many terabytes you want.
Where to go next
If you are still sorting out storage basics, our guide to what an SSD is explains the fast storage inside your devices, our Wi-Fi 7 router buying guide helps the NAS actually reach every screen at speed, and our AMD vs Intel breakdown is worth a read if you go the DIY route and need to pick a processor.