NAS & File Server Costs for SMBs: Pricing and How to Choose

The cost of introducing or replacing a NAS (network-attached storage) or file server typically runs 50,000 to 150,000 yen for a small NAS unit with hard drives, 200,000 to 500,000 yen for a business-grade NAS, and 500,000 to 1.5 million yen for a full Windows Server file server build. For offices with fewer users, moving to cloud storage is also an option, usually costing a few thousand to tens of thousands of yen per month as a subscription. This guide compares the three main options — NAS, Windows file servers, and cloud storage — breaks down the cost components, explains when to plan a replacement, and covers common failure patterns and a pre-order checklist.

There are broadly three ways for a company to share files internally: a dedicated appliance called a NAS, a general-purpose server such as Windows Server configured to share files, or cloud storage services like SharePoint (part of Microsoft 365), Google Drive, or Box accessed over the internet. None is universally correct — the right choice depends on headcount, number of offices, the volume of data handled, and existing contracts.

With the rise of remote work, more SMBs are choosing to use SharePoint in place of a traditional file server. That said, businesses that routinely handle large video or CAD files, or whose existing systems assume an on-premises file server, still find NAS or Windows file servers the more practical choice. Rather than forcing a full move to the cloud, many companies run both in parallel, matching the tool to the department and the type of data.

NAS costs come from a combination of the unit itself, the hard drives (HDDs), RAID configuration, a UPS (uninterruptible power supply), setup work, backup configuration, and a maintenance contract. Prices and reliability vary significantly between consumer-grade and business-grade products, so it helps to start with the overall price range.

One easily overlooked cost is the HDDs. Budgeting based on the NAS unit price alone is risky — most setups need two to four drives (more for larger RAID configurations), which can push the total to 1.5–2 times the unit price. When comparing quotes, always confirm whether the price includes drives or is for the enclosure alone.

A Windows Server-based file server offers more flexibility than a NAS, but at a higher cost and with greater technical demands. On top of the server hardware, you need Windows Server licensing, client access licenses (CALs), and configuration work.

- Server hardware (business-grade physical server): roughly 150,000–400,000 yen
- Windows Server license: roughly 80,000–150,000 yen (varies by edition)
- Client access licenses (CALs): a few thousand yen per user or device
- Active Directory and permission design, shared folder setup: 150,000–400,000 yen
- Backup and redundancy configuration: 100,000–300,000 yen
- Maintenance and monitoring contract: roughly 200,000–500,000 yen per year (varies by scope)

An increasingly common alternative is building a virtual server on a cloud platform such as Azure rather than owning physical hardware. This lowers upfront costs but adds an ongoing monthly usage fee. Whether on-premises or cloud comes out cheaper in total depends on how long you plan to use it and whether you have in-house IT staff, so a simple side-by-side comparison can be misleading.

SharePoint (bundled with plans like Microsoft 365 Business Standard), Google Drive (bundled with Google Workspace), and Box require almost no upfront hardware investment, typically costing 1,000–3,000 yen per user per month. Plans scale up or down easily as headcount changes, and the risk of data loss from disaster or hardware failure is generally lower than with a self-managed NAS.

That said, businesses that constantly exchange large files — design drawings, video assets, CAD files — can run into sync speed or capacity limits with cloud storage. For companies already subscribed to Microsoft 365 or Google Workspace, using the cloud in place of a file server instead of buying an additional NAS can also reduce total cost. Start by checking how much storage is already included in your existing plan.

As a general guideline, a NAS or file server unit lasts about 5 years, and its internal HDDs about 3–5 years. These are only rough benchmarks — actual lifespan varies with usage hours, temperature, and vibration — but the following are signs it's time to consider a replacement.

- About 5 years have passed since purchase, or the manufacturer's warranty or support has ended
- A drive in the RAID array is showing warnings, or one has already been replaced
- OS or firmware updates are no longer being released
- You notice unusual noise, excessive heat, or slower access speeds
- Headcount or data volume has grown and capacity or speed can no longer keep up with the business

HDDs are consumable parts, and assuming "it's still running, so it's fine" is a risky bet. If multiple drives in the same RAID array were purchased around the same time, one failure often signals that the others are close behind. It's better to plan a replacement proactively than to face an emergency file recovery after data loss.

The following failures come up repeatedly around NAS and file server operations. In every case, the issue isn't the hardware purchase itself but the lack of operating rules to go with it.

- Mistaking RAID for a backup: RAID protects against a single drive failure, improving availability, but it is not a backup. It offers no protection against accidental deletion, ransomware, or a fire or flood — a separate copy in the cloud or a dedicated backup/DR setup is still required
- Ransomware encrypting the entire shared folder: Because NAS shared folders are accessible from multiple devices, infection on a single endpoint frequently spreads to encrypt everything in the shared folder. On top of basic ransomware countermeasures, you need offline, version-controlled backups
- The system became a black box after the responsible employee left: If only one person knows the NAS admin password and configuration, their departure can leave the company unable to make changes or respond to trouble. Admin credentials and a configuration diagram should be shared across multiple people or managed at the company level
- Running out of capacity without warning halted operations: Without capacity monitoring, some companies discover a "cannot save" error only when it's already blocking work. Set up capacity alerts and check usage roughly once a quarter
- Skipping a UPS led to data corruption during a power outage: A forced shutdown from a power outage can corrupt HDDs or RAID metadata. A UPS, costing only tens of thousands of yen, is cheap insurance against this

Before requesting quotes from vendors, or selecting a product in-house, confirm at least the following.

- Was required capacity calculated with 3–5 years of expected growth in mind?
- Does the quote clearly state whether it covers the unit alone or the unit plus drives and setup work?
- Is the RAID level (1/5/6, etc.) designed separately from the backup plan, not treated as the same thing?
- Does the backup destination include the cloud or a physically separate location, not just another folder on the same NAS?
- Does the quote include a UPS (uninterruptible power supply)?
- Is the scope of the maintenance contract clear (response time for failures, availability of a loaner unit, phone support)?
- Is admin access and password management shared across multiple people or a department, not one individual?
- Are backups version-controlled (immutable or offline) as a ransomware countermeasure?
- Do you know when the manufacturer's warranty or support ends, and is the next replacement already on the calendar?
- Has migrating to or combining with cloud storage been compared as an option?

NAS and file server costs typically run 50,000–150,000 yen for a small NAS, 200,000–500,000 yen for a business-grade NAS, and 500,000 yen to 1.5 million yen for a full Windows Server build. Choose the approach — including migrating to or combining with cloud storage — based on headcount, data volume, and number of offices. Treat RAID and backup as separate concerns, and budget for a UPS, a maintenance contract, and shared administrative access to avoid regret later.