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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsYes, a DIY NAS server can save hundreds of dollars—but mainly when you reuse an existing computer and compare like-for-like hardware. The saving disappears quickly if you buy a new enclosure, add several hard drives, pay for accessories, and then compare that total with a diskless retail NAS.
The most defensible low-cost design is a repurposed x86-64 desktop or a low-power N100-class system, a small SSD for the operating system, two matching CMR NAS drives in a mirror, wired Ethernet, adequate cooling, and a separate backup. This guide explains what that configuration costs, which software fits, where cheap builds fail, and how to calculate whether your own build really saves money.
Where the $100s saving actually comes from
A retail NAS appliance bundles a case, motherboard, processor, memory, power supply, drive bays, operating system, and support. A DIY server becomes cheaper when you already own most of those items and only need to purchase the storage components.
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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →The strongest saving scenario looks like this:
- Reuse an existing x86-64 computer, small-form-factor PC, or server.
- Reuse suitable memory, case, power supply, and network hardware.
- Buy only the data drives, boot SSD, cables, and any missing storage controller.
- Install free NAS software, or deliberately include the cost of a paid option such as Unraid.
- Compare the result with a retail NAS containing equivalent drives and backup provisions.
The weakest comparison is a diskless DIY box versus a fully populated retail NAS, or a build that counts only the first copy of the data. Shipping, taxes, drive discounts, used-market prices, electricity, replacement parts, software licensing, and the builder’s time can materially change the result.
So “saved $100s” should be treated as a plausible outcome, not a guaranteed or independently verified figure, unless the build is supported by dated receipts, a parts list, and a specific retail comparison.
#1 Best Overall
- High-Speed Data Transmission: The D4-320 hard drive enclosure (a DAS, NOT a NAS) utilizes the USB 3.2 Gen2 protocol, achieving high-speed data transmission of up to 10Gbps. When equipped with four hard drives, the actual read/write speed can reach up to 1,016 MB/s (combined read/write with four SATA III HDDs of 8TB each). With just one SSD installed, the read speed effortlessly reaches 510 MB/s (SATA III 1TB SSD). The D4-320 supports a single HDD up to 30TB, with a total capacity of 120TB, and is compatible with various hard drives, including 3.5-inch SATA hard drives, 2.5-inch SATA hard drives, and 2.5-inch SATA SSDs
- Plug-and-Play Compatibility: The D4-320 USB storage supports 4 individual disks (NO RAID function), and is plug-and-play, eliminating the need for drivers. It is highly compatible with MAC, Windows, and Linux operating systems. The USB Type-C interface supports various computer interfaces, including USB 3.0, USB 3.1, USB 3.2, Thunderbolt 3, and Thunderbolt 4
- Hot Swappable Convenience: The D4-320 HDD enclosure supports hot swapping, allowing users to replace hard disks without powering off the device. This feature enhances convenience and efficiency in data transfer processes
- Tool-Free Hard Drive Management: Featuring a tool-free hard drive tray design, the D4-320 external HDD enclosure enables easy installation and removal of hard drives without requiring additional tools. Furthermore, the D4-320 incorporates TerraMaster's unique Push-lock design, automatically securing the hard drive tray upon insertion, preventing the hard drive from falling out or disconnecting
- Efficient Heat Dissipation and Quieter Operation: The D4-320 direct attached storage incorporates an intelligent temperature-controlled fan for optimal heat dissipation. Additionally, specialized sound-absorbing panels and vibration damping measures contribute to a quieter operation, with noise levels reduced by up to 50% compared to the previous generation. In standby mode, the noise level drops below 21 dB(A), creating a remarkably quiet user environment
A sensible low-cost DIY NAS design
For a beginner, the following is a defensible architecture rather than a claim about one specific completed build:
| Part | Practical choice | Why it matters |
|---|---|---|
| Compute platform | Existing x86-64 desktop, SFF computer, or low-power N100-class system | Reusing the platform is usually the largest source of savings. |
| Memory | At least 8 GB for a basic TrueNAS deployment | TrueNAS’s current minimum guidance calls for 8 GB of memory for basic operations with up to eight drives. |
| Boot device | Small SSD, preferably around or above the documented 20 GB minimum for TrueNAS | Keeps the operating system separate from the data pool and is more suitable for long-term use than a bargain USB stick. |
| Data drives | Two identically sized CMR NAS hard drives | Suitable for a two-drive mirror and better aligned with ZFS workloads than SMR drives. |
| Drive connectivity | Direct motherboard SATA ports, or a supported HBA in IT/JBOD mode | Lets the operating system see drive identity and health information directly. |
| Networking | Wired Ethernet; 1GbE is adequate for many homes, while faster networking requires compatible hardware throughout | Wi-Fi is a poor foundation for a dependable always-on file server. |
| Power and cooling | Reliable PSU, clear airflow, and appropriately sized power protection | Hard drives produce heat and tolerate neither poor cooling nor abrupt shutdowns particularly well. |
This design is appropriate for shared documents, photographs, project files, media libraries, and workstation backups. For construction or trade work, it can provide a central place for plans, estimates, site photographs, and exported project files—but it should not be the only copy of important contract or project data.
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Choosing the processor: reuse first, N100 second
NAS software generally does not need a powerful desktop CPU merely to serve files. Storage layout, drive condition, memory, network speed, cooling, and backup discipline are usually more important than buying a high-end processor.
An Intel N100 is an attractive low-power candidate on paper: it has four cores, a 6-watt processor rating, and a maximum turbo frequency of 3.40 GHz. An N100-based system can be sensible for file serving and light media workloads, but the processor specification is only part of the decision. Check the particular motherboard or mini-PC for:
- the number of usable SATA ports or drive connections;
- maximum supported memory;
- the ability to run the required boot mode and operating system;
- space and power for additional drives;
- hardware video capabilities if media transcoding is important; and
- cooling behavior under continuous operation.
An N100 mini-PC with one internal drive connector is not automatically a NAS. It may need a separate enclosure, USB storage, or a networked disk shelf, each of which changes cost and reliability. A recycled desktop with several direct SATA ports may be the better bargain even if it consumes more power.
Storage: spend here, not on unnecessary CPU power
The data drives are the core of the server. Look for NAS hard drives designed for continuous operation and RAID-oriented workloads. WD Red Plus and Seagate IronWolf are examples of product families marketed and documented for NAS use, but capacity, warranty, recording technology, price, and availability vary by exact model and purchase date.
For a ZFS-based build, prefer CMR NAS drives. TrueNAS’s current guidance warns against using SMR disks with ZFS because their write and resilver behavior can be slower and less reliable. It specifically distinguishes between drive types: DM-SMR and HA-SMR can perform poorly, while HM-SMR is unsupported. Do not assume that any two hard drives with the same advertised capacity are equivalent.
Check the exact model number before buying. The word “NAS” on a product page is not enough; verify whether the model uses CMR or SMR, its warranty, workload rating, vibration features, and whether it is new, used, recertified, or refurbished.
Why two matching drives are a useful beginner starting point
With two identically sized drives, a mirror is easier to understand than RAID0. Each drive stores a copy of the data, so the pool can generally remain available after one drive fails. The trade-off is capacity: usable storage is approximately the capacity of one drive, less filesystem overhead, rather than the combined capacity of both.
A mirror is not the only possible layout, and it is not automatically the best choice for every number of drives. With three or more drives, choose a layout based on capacity, performance, rebuild behavior, and the number of drive failures it can tolerate. Never describe “RAID” as though every RAID level offers the same protection.
Rank #2
- Supports Thirteen Hard Drives: With ample space and compatibility for multiple hard drives, this case ensures you have sufficient storage for all your games and data
- Mesh Front & Side Panel: Allows for efficient air flow, providing optimal cooling performance for your high-end PC components
- Vertical GPU Mount: Show off your graphics card in style and prevent sagging, while keeping it at optimal temperatures for improved performance
- Supports 360 mm Radiator: With the ability to support a 360 mm radiator, this case can efficiently dissipate heat, keeping your system cool and quiet
- Cooling Performance: Designed with cooling in mind, this case maximizes air flow potentials, ensuring your system stays cool and performing at its best
Before creating the pool, record each drive’s serial number and confirm which physical device corresponds to which operating-system identifier. This makes later replacement much safer.
TrueNAS, OpenMediaVault, or Unraid?
The operating system determines how the disks are arranged, monitored, expanded, and recovered. These three options are not interchangeable.
| Operating system | Best fit | Important trade-offs |
|---|---|---|
| TrueNAS Community Edition | Readers who want ZFS checksumming, snapshots, scrubs, replication, and an integrated storage-management platform. | More particular about drive presentation and storage design. The current guidance calls for an x86_64-compatible processor, 8 GB of memory, a 20 GB SSD boot device, and two identically sized storage devices for a single pool. |
| OpenMediaVault 8 | Readers who prefer a comparatively light Debian-based NAS operating system and ordinary Linux administration or merger-style storage arrangements. | Supported hardware follows Debian’s supported architectures. The current ready-to-use ISO supports AMD64 in BIOS mode, and its downloadable guide recommends 8 GiB of RAM for basic default operations. |
| Unraid | Readers who prioritize flexible expansion with unlike-sized drives, parity protection, cache pools, containers, and an approachable interface. | It is a paid, proprietary operating-system option. Its array configuration controls how data is managed, protected with parity, and optimized with cache pools. |
When TrueNAS is the right choice
TrueNAS is compelling when data integrity features are central to the project. ZFS provides checksumming, snapshots, scrubs, and replication tools that make it more than a simple network share.
It does not require treating ECC memory as a universal installation prerequisite. TrueNAS recommends server-class hardware and ECC where practical, but its documented minimum is broader. The sensible decision is to weigh the value of ECC, platform stability, drive connectivity, and budget rather than declaring that every home installation without ECC is invalid.
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When OpenMediaVault 8 is the better fit
OpenMediaVault 8 is a reasonable choice when the builder is comfortable with Debian and Linux administration and wants a lighter system. It may also suit storage arrangements built from ordinary Linux filesystems or merger-style tools rather than a single ZFS pool.
Pay attention to the installation method. The current official prerequisites say that supported systems are constrained by Debian-supported architecture, while the ready-to-use ISO currently supports AMD64 in BIOS mode. Confirm that the hardware and boot configuration match the documentation before wiping any disk.
When Unraid earns its license cost
Unraid is worth considering when drive flexibility matters more than using a conventional matched-drive pool. Its parity-protected array and cache-pool approach can make gradual expansion with unlike-sized drives easier to manage, and its interface is designed to combine storage administration with containers and other services.
Rank #3
- 【Reliable External Storage System for Individuals and business】The 3.5 hard drive enclosure supports 2.5/3.5 inches HDD and SSD, max capacity up to 20TB for each hard drive, it's a ideal external hard drive enclosure for personal or enterprise using.Save space on your desktop or laptop.
- 【No heat】The 6 bay hard drive enclosure built in Aluminum-Alloy materials and two 2.7 inch Fans.Maximize the security of your data. NOTE：Fan noise is around 40-50 decibels, not recommended if you are very sensitive to noise.
- 【Up to 5Gbps】This dual bay enclosure equips with advanced chips and USB 3.0 output interface.Transfer 1G files in 3-5 seconds with USB 3.0 Ports, which is 10 times faster than USB 2.0.
- 【Hot Swappable Convenience】The HDD enclosure supports hot swapping, allowing users to replace hard drives without powering off the device. This feature enhances convenience and efficiency in data transfer processes.
- 【Tool-Free Installation】Featuring a tool-free hard drive tray design, the external hard drive enclosure enables easy installation and removal of hard drives without requiring additional tools. Plug and play! No fuss, no muss!
It should be evaluated as a paid proprietary option, not presented as another fully open-source alternative. Include the license cost in the DIY total when comparing it with a retail NAS.
Motherboard SATA ports and the HBA decision
A low-cost build often fails at the point where the owner tries to add more drives than the motherboard supports. Do not solve that problem with an arbitrary RAID card.
If additional connectivity is needed, look for a supported SATA HBA in IT mode. TrueNAS identifies LSI SAS2008-based cards such as the LSI 9211, along with rebranded IBM M1015 and Dell H200 cards, as common second-hand options. The precise card, firmware, breakout cables, connector type, PCIe slot, and seller condition all matter.
IT mode or JBOD presentation allows the operating system to manage the disks directly. A hardware RAID card can introduce an additional abstraction layer, hide SMART data, conceal serial numbers, or complicate recovery when the card fails. Second-hand HBA listings also vary in firmware quality, so verify the card’s condition and compatibility rather than choosing the cheapest listing.
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- Define the workload. Decide whether the server will store files only, run snapshots, host containers, stream media, perform transcoding, or support several users at once. Do not buy hardware for a workload you do not have.
- Calculate the required capacity. Estimate current data, annual growth, filesystem overhead, and the space needed for snapshots. A mirror of two drives provides roughly one drive’s usable capacity.
- Plan the backup separately. Decide where the second or third copy will live before trusting the NAS with important files.
- Audit the reused computer. Confirm x86-64 compatibility, memory, SATA ports, boot support, PSU condition, cooling, drive mounting, and wired networking.
- Install a dedicated boot device. Use a small SSD for the operating system. Keep the data drives available for the pool rather than mixing boot files into the storage layout.
- Connect drives directly or through a compatible HBA. Avoid hardware RAID for a ZFS system. Label drive bays and record serial numbers.
- Install the chosen NAS operating system. Be careful during installation: selecting a data drive as the boot target can erase it.
- Create the storage layout deliberately. For two drives, a mirror is the straightforward redundant choice. For additional drives, document the layout’s usable capacity and failure tolerance before creating it.
- Create datasets, shares, and permissions. Separate working files, backups, media, and application data where the operating system supports that organization. Use individual accounts instead of one unrestricted login.
- Test before migration. Copy non-critical data, test access from each client, verify alerts, check SMART data, and restore a sample file from the backup.
- Only then migrate important files. Keep the original files until the new server, its backup, and the restore process have all been verified.
What the DIY build actually needs
Parts checklist: The storage purchase is usually the largest unavoidable expense. Choose NAS hard drives by exact model, CMR/SMR type, capacity, warranty, and condition—not just by the headline price. Keep the operating system separate with a small SSD boot drive. If the motherboard lacks enough direct ports, investigate a compatible SATA HBA in IT mode. For a system that will run continuously, size a UPS for a home server to the measured load and confirm that the operating system supports its shutdown signaling.
Product prices, availability, warranties, and compatibility change. Any commercial links associated with these recommendations should be disclosed as required.
A 2.5GbE network adapter can also be useful when the NAS, switch, and client computers all support faster networking. It is not a substitute for a fast storage layout, and it will not make a single hard drive deliver 2.5Gbps of real-world file transfer.
RAID is not backup
A mirror, RAIDZ pool, or parity array can improve availability after a drive failure. None of them protects against accidental deletion, ransomware, fire, theft, a faulty update, a power event, or a mistake that is replicated instantly across the array.
Use the 3-2-1 approach recommended by CISA:
- Three copies of important data;
- on two different types of media; and
- with one copy off-site.
For example, the NAS can be the primary working copy, an external drive can be a scheduled backup, and an encrypted cloud or remote copy can provide off-site protection. An external drive that remains permanently connected to the NAS is convenient, but it is not a complete response to ransomware or electrical damage.
Test restoration, not merely backup completion. A green backup status only shows that a job finished; it does not prove that the required files can be opened and restored.
Used drives and the “cheap” part of a cheap server
Used or recertified drives can reduce the upfront cost, but they need more scrutiny than new drives. TrueNAS warns that recertified drives may have their operating hours reset and recommends checking SMART information.
Rank #4
- Note: When using this product, please first confirm that the hard drive loaded into this product is normal, otherwise it will lead to not out of the drive, such as loading more than one hard drive, it will only show one, can not confirm which one is bad, please load a hard drive, power on, out of the drive a, confirm that it is normal, turn off, and then load the second, in the power on, out of the drive two, to confirm that it is normal, and so on, one by one to load, until you find the The problematic hard drive. For example, if there is a problem with one of the 8 hard drives, only one drive will come out.If you have any questions, please contact me promptly.
- 【Reliable External Storage System for Individuals】The 3.5 hard drive enclosure supports 2.5/3.5inches HDD and SSD , max capacity up to 160TB( 20TB for each hard driveit's a ideal external hard drive enclosure for personal or enterprise using.
- 【No heat】The 8 bay hard drive reader built in Aluminum-Alloy materials and two 2.9 inch Fans.Maximize the security of your data. NOTE：Fan noise is around 40-50 decibels, not recommended if you are very sensitive to noise.
- 【Up to 5Gbps】This 8 bay enclosure equips with advanced chips and USB 3.0 output interface, Max 5Gbps under UASP control.Transfer 1G movie in 3-5 seconds with USB 3.0 Ports, which is 10 times faster than USB 2.0.
- 【Stable power supply】Equipped with DC 12V20A power adapter to provide stability for high-speed transmission.
Before putting a used drive into service:
- read all available SMART attributes and error logs;
- check reported power-on hours and start-stop counts;
- perform a full surface or read validation appropriate to the drive and operating system;
- check for pending, uncorrectable, or reallocated sectors;
- confirm the actual model and recording technology; and
- keep a replacement plan and a current backup.
A burn-in process can expose an immediately failing drive, but it cannot guarantee future reliability. A drive that passes a test is not made new by the test.
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Boot media, power, and cooling are easy to underestimate
Use an SSD rather than assuming a USB stick is good enough
A cheap USB flash drive may boot a NAS operating system, but that does not make it a good long-term boot device. Current TrueNAS guidance favors an SSD and warns that USB drives and SATA DOMs vary in quality and may not tolerate boot-pool writes reliably. A small SSD is a modest addition to the budget compared with the disruption caused by a failed boot device.
Protect the server from power interruptions
A UPS can provide time for a controlled shutdown and reduce exposure to abrupt power loss. It is not a universal guarantee of data safety. Choose its capacity from the system’s measured load, account for the number of connected devices, and verify compatibility between the UPS signaling method and the NAS operating system.
Do not hide the drives in a hot enclosure
Hard drives need airflow, secure mounting, and sensible fan control. An old desktop case may be financially attractive but still need dust removal, replacement fans, or a better drive cage. Check the power supply’s age and condition; the lowest-cost case is not a bargain if its wiring or cooling is unsuitable for several continuously spinning drives.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to calculate the saving honestly
Use a complete, dated comparison rather than a headline number.
| DIY cost category | Include it? |
|---|---|
| Data drives | Always include them, with exact model, capacity, and recording technology. |
| Boot SSD | Include it, especially for TrueNAS. |
| Computer platform | Use its actual purchase price if bought for the project. If already owned, label the value as reused hardware rather than pretending it was free. |
| Memory, case, PSU, fans, and drive mounts | Include new purchases and necessary replacements. |
| HBA, breakout cables, SATA cables, and network adapter | Include anything required to make the system function. |
| Operating-system license | Include paid software such as Unraid; do not assume every option has the same licensing model. |
| UPS and backup media | Count these in a responsible ownership comparison, even if you show a separate “minimum build” total. |
| Shipping and taxes | Include them when claiming a dollar saving. |
| Time and electricity | Show separately if you do not want to assign a monetary value, but do not imply that labor and power are zero-cost. |
Then compare against a retail appliance with the same scope:
- Does the retail price include drives?
- Does the DIY total include drives?
- Are both systems compared with the same usable capacity?
- Are backup media and a UPS included in both scenarios?
- Is the retail system diskless, partially populated, or fully populated?
- Are software licensing and expansion costs treated consistently?
The resulting figure may still be a substantial saving, particularly when the computer platform is reused. It may also show that a retail NAS is worth the premium for warranty coverage, lower setup effort, lower power consumption, smaller size, or simpler support.
DIY NAS versus a retail appliance
| DIY NAS | Retail NAS |
|---|---|
| Can reuse existing hardware and reduce initial cost. | Usually offers a more integrated enclosure, drive bays, and support path. |
| Allows unusual CPU, case, drive, and software combinations. | Often has better-documented compatibility within its product range. |
| Requires the owner to diagnose hardware, software, cooling, and drive problems. | May offer a single warranty and a simpler replacement process. |
| Can be expanded cheaply if the platform has spare ports and room. | Expansion may be limited by bay count or proprietary accessories. |
| May use more electricity if based on an old desktop. | May be more compact or efficient, but not necessarily cheaper once populated with drives. |
Choose DIY when you enjoy control, already have suitable hardware, and are willing to maintain the system. Choose a retail appliance when predictable support, compactness, lower setup risk, or a warranty matters more than extracting the lowest purchase price.
Best Value
- High-Performance NAS with Powerful Procesor: DXP4800 Plus is ideal for small offices, & More. You can enjoy smooth performance and seamless collaboration, while making use of advanced features like Docker and virtual machines. It works semalessly across every device inluding Windows, macOS, Linux, iOS, Android or Google services and so on.
- Better Way to Store Than External Drives: NAS offers centralized storage, automatic backups, remote access, and a wide range of RAID options for easy data recovery even if a drive fails. Massive Storage Capacity: Never worry about storage limits again. With up 144TB capacity, you can store 50 million 1MB photos or 98K 1.5GB movies，5 million 30MB songs! *Hard Drives not included.
- Super-Fast Transfers: Back up 1GB in less than a second using either the 10GbE network port or the 10Gbps USB ports.
- Secure Private Cloud: Retain 100% data ownership with advanced encryption to protect your files. Flexible permission management makes it easy to protect your privacy when collaborating with others.
- AI-Powered Photo Album: Automatically organizes your photos by recognizing faces, scenes, objects, and locations. It can also instantly remove duplicates, freeing up storage space and saving you time.
Common cheap-build mistakes
- Buying drives based only on capacity. Recording technology, condition, warranty, and workload suitability matter.
- Using SMR drives in a ZFS pool. TrueNAS specifically warns about poor or unsupported SMR behavior.
- Calling a mirror a backup. Redundancy and independent recovery copies solve different problems.
- Using the cheapest USB stick as permanent boot media. An SSD is the safer default for TrueNAS.
- Putting ZFS behind hardware RAID. This can hide health data and complicate recovery.
- Ignoring motherboard limitations. A small PC may lack SATA ports, drive bays, expansion slots, or adequate cooling.
- Installing before documenting the hardware. Record drive serial numbers and intended layout before the first destructive operation.
- Migrating data without testing restoration. A NAS is not finished until files can be recovered from backup.
- Underestimating the used market. Recertified drive hours may be reset, and second-hand HBAs may have incompatible firmware.
- Exposing the administration interface casually. Keep management access restricted and use strong, unique credentials.
Before calling the build a success
Run through this checklist:
- The system boots reliably from its dedicated SSD.
- Every data drive is identified by model and serial number.
- The pool or array reports the intended redundancy and usable capacity.
- SMART monitoring and system alerts are configured.
- File shares work from the intended computers over wired Ethernet.
- Permissions prevent ordinary users from changing administrative settings.
- A test file can be backed up and restored successfully.
- The backup copy is independent of the primary pool and, ideally, off-site.
- Drive temperatures and fan behavior are reasonable under load.
- The UPS, if installed, can signal or support a controlled shutdown.
- You have a written replacement procedure for a failed drive.
If the author of a specific build wants to make a genuine first-person claim about saving hundreds, the supporting record should include the CPU and motherboard, memory, case, PSU, drive models and capacities, software and version, purchase dates and prices, storage layout, measured power draw, network speed, benchmark method, and the exact retail product used for comparison. Without those details, the responsible claim is that this type of build can save hundreds—not that every cheap DIY NAS does.
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Frequently Asked Questions
Can I turn an old desktop into a NAS?
Often, yes. Confirm that it is x86-64 compatible, has enough memory, provides sufficient SATA connectivity, has a healthy power supply, supports adequate cooling, and can boot the NAS operating system. An old desktop may save money but use more electricity than a newer low-power platform.
Is an Intel N100 powerful enough for a NAS?
An N100’s four cores, 6-watt rating, and up-to-3.40GHz turbo frequency make N100-based systems plausible for file serving and light media workloads. Check the specific system’s SATA expansion, memory limit, cooling, and transcoding capabilities before buying.
How much usable storage does a two-drive mirror provide?
Approximately the capacity of one drive, less filesystem overhead. The second drive stores the duplicate copy that allows the mirror to continue operating after one drive fails.
Does RAID replace a backup?
No. RAID improves availability after certain hardware failures, but it does not protect against deletion, malware, fire, theft, or other events affecting the whole system. Use separate copies and follow a 3-2-1 backup plan with one copy off-site.
Which is better for a cheap NAS: TrueNAS, OpenMediaVault, or Unraid?
Choose TrueNAS Community Edition for ZFS checksumming, snapshots, scrubs, and replication; OpenMediaVault 8 for a lighter Debian-based system and familiar Linux administration; and Unraid when flexible expansion with unlike-sized drives, parity, cache pools, containers, and an approachable interface justify its paid proprietary license.
The Bottom Line
The cheapest responsible DIY NAS is usually not a box built entirely from new parts. It is a suitable computer you already own, paired with correctly chosen CMR NAS drives, a dedicated SSD boot device, direct disk access, adequate cooling, and an independent backup. Price every required component and compare equivalent drive capacity before claiming a saving. If the build still wins after that—and you are willing to maintain it—the $100s saving can be real.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
