How to Budget for On-Premise Storage: 2026 SMB Cost Planning

Leo · 2026-10

Five line items decide whether on-premise storage costs less than the plan you are already on: the appliance, the drives, the redundancy level, the network path, and the spares you will need before year three.

On-premise storage means owning the hardware that holds your files instead of renting space from a provider, which is also why learning how to budget for on-premise storage takes more than a single quotation. This guide builds the number for a US small business, using published prices and arithmetic you can repeat on your own figures.

The Five Line Items in an On-Premise Storage Budget

A storage budget has one visible cost and four quiet ones. The appliance is the visible part, and it is rarely the largest.

• Appliance: the enclosure, processor, memory and boot storage. Published single-unit prices start at $150.
• Drives: bought separately, priced by capacity, and the dominant line in most builds.
• Redundancy: the capacity you give up to survive a drive failure.
• Network path: cabling and switch ports that decide how fast data actually moves.
• Spares and support: a replacement drive on the shelf, plus the hours somebody spends on it.

If you are an office manager at a 15-person firm, the four quiet items are the ones nobody handed you a quote for. Fund them in the same cycle as the appliance or the year-three surprise is predictable.

Usable Capacity: Raw Minus Parity

Usable capacity is raw capacity minus whatever the redundancy level consumes. Nothing else changes that number, and no product removes it.

A mirror keeps two identical copies, so two drives of equal size yield the capacity of one. Two 24 TB disks store 24 TB, not 48 TB.

RAID 5 spends one disk’s worth of capacity on parity, so usable capacity is the raw total minus one drive: with four 10 TB disks, (4 − 1) × 10 TB = 30 TB usable. RAID 6 spends two disks, which buys tolerance for a second failure during a rebuild.

The formula to carry into any vendor conversation is short: usable = raw − parity, and parity = 0 for a stripe, one drive for RAID 5, two for RAID 6, half the raw total for a mirror.

Ask the vendor which levels the specific SKU supports rather than which levels the product family supports. That gap is where budget plans get rebuilt.

The Published Price Ladder, Read Carefully

Published single-unit prices for woCyber platforms are $150, $170, $195 and $400 across four models. Capacity ceilings run from 30 TB to 120 TB, so the price per terabyte of ceiling is narrower than the price gap suggests.

Read the last row as a hardware figure only. It divides the published price by the published capacity ceiling, and it says nothing about drives, since drives are bought separately at whatever capacity you choose.

That row also explains why the four-bay unit is not the expensive one per terabyte. The 120 TB ceiling spreads $400 across the most capacity, and the extra bays are what let you grow without replacing the chassis.

Two specifications in that table are worth checking upstream. The X4 runs an Intel N100, and Intel’s own product specification for that processor lists a maximum memory size of 16 GB (Intel ARK, Intel product page queried October 8, 2026), which is why the standard 8 GB configuration has a defined ceiling. The 2.5GbE ports come from the IEEE 802.3bz work on 2.5G/5GBASE-T, which was scoped around existing Cat5e or better cabling (IEEE 802.3bz, task force page queried October 8, 2026). Every port rate quoted here is a theoretical line rate, and real transfers land below it.

The Line Items Buyers Forget

Four line items get missed often enough to name. The first is the second copy: a local appliance is not a backup on its own, and a three-two-one plan needs one copy somewhere else. The second is the network switch. A 2.5GbE appliance on a gigabit switch negotiates down to gigabit, and the upgrade budget then belongs to the switch, not the storage.

The third is time. Somebody has to create accounts, set retention, and watch the dashboard when a drive reports a problem. In a small firm that person is usually whoever already handles IT, and their hours are a real cost even when they never appear on an invoice. Teams that cost those hours at zero consistently underestimate local storage, and then conclude the hardware was more expensive than the cloud. Put your current monthly storage invoice beside the appliance, the drives, the switch and the hours, and compare two numbers rather than one. If the appliance is paid once and drives are replaced on their own cycle, the local figure tends to sit still while the invoice does not.

Cost of egress is the fourth item, and it only appears when data moves back out of a provider. It is worth understanding before the budget is written: cost-of-data-egress-from-cloud-business-nas.

A Hypothetical 15-Person Studio, Budgeted Line by Line

Consider a hypothetical 15-person design studio moving two shared folders off a cloud plan. No real customer is described; the numbers below are assumptions you can replace with your own.

The working set is about 25 TB after three years, which is 25 TB ÷ 3 ≈ 8.3 TB of new material a year. Call it 30 TB usable to leave headroom.

A four-bay platform reaches 30 TB usable in RAID 5 with four 10 TB drives, as the earlier example showed. The same 30 TB usable on a mirrored two-bay unit would need 60 TB of raw drives in RAID 1, which costs more in drives and buys tolerance for only one failure.

So the fixed costs land at $400 for the four-bay appliance, one switch with 2.5GbE ports, four drives at whatever capacity and price you can source, and one spare drive on the shelf.

Get two drive quotes before the appliance model is fixed. In most builds the drive line runs larger than the enclosure line, sometimes by a wide margin, and it is the only line that moves with capacity. The switch is a separate purchase with its own port count, so count one switch per site and one free port per appliance.

The arithmetic is yours to set with your own write-off horizon. Over a five-year write-off the four-bay appliance works out to $400 ÷ 5 = $80 a year, and the two-bay alternative at $195 works out to $195 ÷ 5 = $39 a year. Swap the five for whatever horizon your accountant uses.

That difference is small next to drives, which is the argument for choosing bays before choosing capacity. The chassis is the part you keep.

How Do You Decide Between an Entry Device and a Mid-Tier One?

Decide on the growth path, not on today’s storage total. Today’s total is the number that misleads most budgets.

An entry device makes sense when the working set fits inside one mirror and the growth is slow and predictable. Two bays, RAID 1, and a published 48 TB ceiling is a comfortable first appliance, and the A2 Pro is the two-bay platform woCyber publishes for that slot, at $170 with ONVIF and PoE camera support on a gigabit port: products/a2-pro-nas.

A four-bay chassis makes sense when the working set already exceeds a single drive, or when video is involved. Four bays allow RAID 5 or RAID 6, and the X4 pairs them with two 2.5GbE ports that aggregate or fail over up to 5 Gbps.

My own rule, for what it is worth: if the budget only stretches to one upgrade this year, buy the spare drive and run a mirror rather than paying for a faster processor. Redundancy first, speed second.

Cameras change the shape of the answer again, because retention days multiply stored volume. Sizing that math is its own exercise: nas-video-surveillance-retention-storage-sizing. Cold archives pull in the other direction, since infrequently read material can sit on slower capacity: enterprise-nas-cold-data-storage.

The full hardware range, including the security kit for camera installations, is listed under products.

What Has to Be in the Written Quotation?

Four commercial terms should arrive in writing rather than in a call. The minimum order quantity from an OEM supplier, the sample policy, the tooling position if anything is customized, and the payment, warranty and lead time terms.

The written quotation is the other half of how to budget for on-premise storage. The number on the storage device page is not the number on the order, and the gap between them is usually terms rather than hardware.

On the woCyber side, the published floor is a per-project minimum for a reconfiguration of an existing platform, and a quoted threshold where a new PCB respin or a new mould is needed. Sample units are billed at the published single-unit price, then credited in full against the first production order.

Payment terms, warranty and lead time are settled in writing at quotation or at order confirmation. Buyers should treat those documents, not a product page, as the source for dates and percentages.

Certification is the other written item. The published set is CE, UKCA, FCC, RoHS, REACH and WEEE, and every unit passes a 72-hour burn-in test before 100% outgoing inspection. For a buyer assembling a compliance file, that is the list to request with the quotation.

Sourcing a storage appliance is a channel question as much as a hardware question, and programs differ by how they handle regional inventory and pricing: broadband-provider-storage-device-supplier. If the local-versus-cloud decision is still open on cost grounds alone, the comparison is worth running in full before the budget is fixed: cloud-storage-too-expensive-on-prem-alternative.

FAQ: Budget Questions From First-Time Buyers

How much usable capacity does a mirrored pair of drives give? Half the raw total. Two 24 TB drives in RAID 1 store 24 TB, because the second copy mirrors the first. A four-bay unit in RAID 5 with four 10 TB drives stores 30 TB usable, which is the raw total minus one drive.

Should the drive cost sit inside the appliance line? No. Published single-unit prices cover the enclosure, board, memory and boot storage, and drives are bought separately. Keeping them apart makes it obvious which line grows when capacity requirements change.

How long does the first full backup take? One terabyte is 8,000 gigabits, so a gigabit port needs about two hours and a 2.5GbE port about fifty-three minutes at line rate. Protocol overhead and disk speed add to both figures.

Which spec decides whether you need four bays? The working set against the largest single drive. If the data already exceeds one drive, a mirror cannot hold it and RAID 5 or RAID 6 becomes the realistic choice, which needs at least three or four bays.

What has to be in the written quotation? Minimum order quantity, sample policy, tooling ownership, and payment, warranty and lead time terms. The published certification set, CE, UKCA, FCC, RoHS, REACH and WEEE, should be requested alongside them, with the 72-hour burn-in record for the batch.