Best Budget NAS: Cheap Boxes Worth Owning in 2026

Budget NAS shopping goes wrong in a predictable way: buyers compare enclosure prices, pick the cheapest one, and then discover the box was never the expensive part. Money saved on the enclosure should go straight into drives, because the drives decide capacity, rebuild time and how long the array lives. And a one-bay unit has no redundancy at all, which makes it a backup target rather than storage.

Three picks below covering roughly $139 to $390, then the honest argument about where a constrained budget should actually go. The short version: buy two bays, buy x86, and put every remaining dollar into capacity.

Best budget NAS by what you need it to do

Beginner Cheapest sensible entry

Synology

Synology DS124 (1-Bay Diskless)

$138.99

One bay means no redundancy at all, which is fine if this is a backup target rather than your only copy. You get the full DSM software stack for the price of a drive dock.

Best for: A destination for laptop backups, not a place to keep the only copy of anything.

Check price

Intermediate Best value two-bay

TerraMaster

TerraMaster F2-425 (2-Bay, Quad-Core x86)

$239.98

An x86 quad-core at this price is unusual, and x86 is what lets you run containers and transcode rather than just serve files.

Best for: Buyers who want mirrored redundancy and room to run a few services.

Check price

Expert Budget with headroom

UGREEN

UGREEN NASync DXP2800 (2-Bay Diskless)

$389.74

UGREEN pairs an Intel N100 with M.2 slots, so it handles Plex transcoding and container workloads that a low-cost ARM box cannot.

Best for: People who want budget hardware but expect to run more than a file share on it.

Check price

Prices change often, confirm on Amazon. As an Amazon Associate we earn from qualifying purchases.

Where a limited budget should actually go

Take a fixed $900 and split it two ways. Spend $390 on the enclosure and $510 is left, which buys two 4 TB drives at roughly $220 to $248 each, giving 4 TB usable in a mirror. Spend $240 on the enclosure and $660 is left, which buys two 8 TB drives at $289.99, giving 8 TB usable with change to spare.

Same money, twice the storage. That is the entire budget argument, and it holds at every price point because enclosures improve gradually while drives improve in steps you can count.

Usable capacity is decimal TB before filesystem overhead. A two-drive mirror gives you one drive of capacity regardless of layout name. Note that the third row has no redundancy at all, because the cheap box has only one bay.

A one-bay NAS is a backup target, not storage

This needs saying plainly because the price is tempting. A single-bay NAS has no redundancy. There is no parity, no mirror and nothing to rebuild from. When the drive fails, and drives fail at roughly 1.0 to 1.6 percent per year across large fleets, everything on it is gone.

That is not a reason to avoid one. It is a reason to be honest about the job. A one-bay unit is an excellent destination for laptop backups, a place for a nightly copy of the data that already lives somewhere else. In 3-2-1 terms it is copy two, and copy two is allowed to be unprotected because copies one and three exist.

Do not make a one-bay NAS the only home for anything. If the only copy of your photos is on a single unprotected spindle, you have bought a countdown, not a backup. Size the job properly with the 3-2-1 backup sizing calculator.

Two bays and x86 are the two upgrades worth paying for

Two bays gets you a mirror, which means one drive can die without taking the data with it. It halves your usable capacity, and that is the correct trade at this budget level because the alternative is no protection at all.

x86 is the other one. An ARM NAS board is cheaper, quieter and idles around 8 W, and it will serve files well. What it will not do is run the broad Docker ecosystem comfortably or hardware transcode video, because hardware transcoding on Intel chips comes from the Quick Sync engine in the integrated graphics. An N100 or a quad-core x86 at the same price keeps those doors open for 15 to 20 W instead.

Everything else in the budget tier is negotiable. Memory can usually be upgraded, M.2 cache slots are a nice-to-have that most home workloads never benefit from, and 2.5GbE is pleasant but only matters if you also own a 2.5GbE switch. Bays and processor architecture are the two you cannot fix later.

Which two-bay build is cheapest per usable terabyte?

The budget argument above is easy to state and easy to doubt, so here it is priced out completely. Each row is the same two-bay value enclosure at $239.98 with a different pair of drives, and the column that settles the argument is the last one.

A two-drive mirror gives you one drive of usable capacity whatever the layout is called, so usable equals the single drive size. Figures are decimal TB as printed on the label, and your NAS will report each about 9.05 percent smaller because it counts in binary tebibytes. Prices change often, confirm on Amazon.

The spread runs from $93.00 per usable terabyte on the Seagate IronWolf Pro 12TB NAS HDD (ST12000NT001) build to $173.00 on the WD Red Plus 6TB NAS HDD (WD60EFZX) build, which is a difference of roughly 86 percent for the same enclosure and the same protection. The enclosure never appears in that comparison, and that is the point. Once the box is chosen sensibly, every remaining decision that matters is a drive decision, which is why how to choose NAS drives is the page to read next.

What does a budget NAS cost to run?

A NAS is a device that runs 8,760 hours a year, so idle draw is a bill you pay continuously. A two-bay x86 box with both drives spun up sits around 18 watts, which is about 158 kilowatt hours or $28 a year at 18 cents per kilowatt hour. That is small enough to ignore, and it is exactly why the free-old-desktop route is usually a false economy: a repurposed tower idling at 60 watts costs closer to $95 a year for the same job.

Two running costs are larger than the electricity and both get forgotten at this budget level. The first is the backup target, because a mirror is copy one and nothing else, and the backup sizing calculator will tell you what capacity you need for copies two and three. The second is the eventual drive replacement: mechanical drives fail at roughly 1.0 to 1.6 percent per year across large fleets and the rate rises past five years of service, so budget for a replacement pair inside the life of the box. Work your own odds on the drive failure probability calculator.

What you give up at this price, stated honestly

• ECC memory. Nothing in the budget tier has it. For a media library that is fine, for a decade-long photo archive it is a genuine gap.
• Bay count. Two bays means the only capacity upgrade available is replacing both drives, and mirrors do not grow.
• SHR. Mixed drive sizes are only used fully on Synology hardware. Everywhere else, adding a larger drive strands the excess. See SHR against RAID 5.
• Software maturity. The cheaper operating systems work, but the polish and the app catalogue are not the same, and neither is the update history.

Who should not buy the Expert pick

The UGREEN NASync DXP2800 at $389.74 is the strongest hardware here: an Intel N100 with M.2 slots, which handles Plex transcoding and container workloads a cheaper board cannot. Most budget buyers still should not buy it.

It costs $149.76 more than the two-bay value pick, and $149.76 is most of an 8 TB NAS drive. If the choice is a better enclosure with 4 TB drives or a good-enough enclosure with 8 TB drives, the second system holds twice as much for about the same total and will still be adequate in three years when the first one is full. The M.2 slots are the specific trap: read cache on a home NAS improves benchmark numbers far more than it improves anything you actually do.

Buy the Expert pick if you already know you want to run several containers plus Plex on the same box and you have the drive budget separately funded. If the $900 has to cover everything, put that money into drives instead.

Related reading

• Best NAS hard drives for where the saved budget should go, ranked by price per terabyte
• Best NAS under $500 for complete build totals including drives
• First home server buying order so you buy the right things in the right sequence
• NAS against a DIY server if you have old hardware sitting unused
• Power draw calculator because a cheap box running continuously is not cheap if it draws 70 W

Deciding on a specific model? We review the A-Tech 32GB ECC UDIMM DDR4 kit review in full.