The UniFi UNAS Pro 8 NAS Review – The Difficult 2nd Album…

Note, the UNAS Pro 2 is NOW LIVE on the UniFi Store . The UNAS 4, UNAS Pro 4 and UNAS Pro 8 are now in the site, but are not available till October.

The UniFi UNAS Pro 8 is the latest rackmount NAS in Ubiquiti’s gradually expanding storage lineup and serves as a direct successor to the UNAS Pro released in late 2024. That earlier seven-bay system introduced UniFi’s first attempt at a prosumer-class NAS with 10GbE connectivity and integration into the UniFi ecosystem, but it was limited in scope by its unusual drive count, absence of fan control, and lack of redundant power options. The Pro 8 addresses many of those concerns by standardising the layout to a full eight 3.5-inch bays, adding dedicated M.2 NVMe slots, and adopting a 2U rackmount form factor with hot-swappable dual power supplies. It also includes a set of rails in the box, something not always seen in turnkey solutions of this scale.

From a technical perspective, the UNAS Pro 8 remains anchored to an ARM-based architecture, employing a quad-core Cortex-A57 processor at 1.7 GHz paired with 16 GB of non-upgradeable memory. This positions it differently from x86 alternatives from Synology or QNAP, limiting its scope for high-end virtualisation or transcoding tasks but keeping overall efficiency high. Network expansion is one of its more striking features, with three 10GbE connections — two SFP+ and one copper port — included by default, offering redundancy and multi-channel potential well beyond the capacity of eight SATA drives. Taken together with the dedicated M.2 NVMe caching support and optional redundant PSUs, the Pro 8 represents an incremental but deliberate step forward in UniFi’s second phase of NAS development.

UniFi UNAS Pro 8 Review – Quick Conclusion

The UniFi UNAS Pro 8 is a clear refinement over the first-generation UNAS Pro, standardising the design to eight bays, introducing hot-swappable dual PSU support, and improving cooling and fan control, while also including rack rails for easier deployment. It delivers solid storage functionality with RAID up to level 6, clustered pools, snapshots, encryption, and read/write caching via NVMe modules, though the caching remains limited to automated policies and the required trays are sold separately. Networking is unusually strong for an eight-bay ARM system, with three 10GbE interfaces providing flexibility for aggregation or failover, even if the storage media is unlikely to saturate that bandwidth. Performance testing showed read speeds close to 850 MB/s in RAID 5 with HDDs, with lower write speeds reflecting the ARM Cortex-A57 processor’s constraints, and SSD arrays would likely achieve closer to 10GbE saturation. The operating system has matured but remains more streamlined than established platforms, with no iSCSI, limited protocol support, and basic backup tools, making it more suitable for straightforward file storage than advanced workloads. Ultimately, the Pro 8 fits best for users already invested in UniFi infrastructure or those seeking a rackmount NAS with strong connectivity and efficiency, but it is not yet a direct alternative to feature-rich solutions from long-standing NAS vendors. That said, if you want an incredible value and solid ‘storage-focused’ rackmount NAS solution – this might well be one of the best examples in 2025!

BUILD QUALITY - 9/10

HARDWARE - 8/10

PERFORMANCE - 7/10

PRICE - 9/10

VALUE - 10/10

8.6

PROS

Multiple RAID Configurations supported, but also clustered RAID\'s and support of M.2 NVMes for Caching
M.2 Injection is unique, well thought out and easy to utilise for caching
THREE 10Gb/s PORTS (technically)! Kind of insane actually, for a 8x SATA drive machine
Dual PSU and Failover hugely welcome, after it\'s omission on the UNAS Pro 2024
16GB RAM out the box is a significant upgrade over the UNAS Pro from 2024
Benefits from almost a year of development of the UNAS Pro by UniFi, resulting in a much more complete solution in both hardware and software
Rackmount rails are included in the UNAS Pro 8 retail box, and are of a high quality
Exceptionally appealing price point
Supports complete network/local access if preferred, as well as full remote connectivity with the UI.com account and site manager services
Wide Hard Drives and SATA SSD Support (UniFi branded drives and those from 3rd parties such as Seagate Ironwolf, WD Red and Toshiba N300)
Ditto for the m.2 NVMe support, though you will need to m.2 adapter trays
Comprehensive network storage software in UniFi NAS OS and Drive.
Latest OS updates have included fan control, flexible RAID configurations, encrypted drive creation, customizable snapshots, more backup client choices/targets
\'Single Pane of Glass\' management and monitoring screen is very well presented!
One of the fastest to deploy turnkey NAS solutions I have ever personally used!

CONS

Lack of USB connectivity for convenient plug and share storage drives, network upgrades, 3rd party UPS support and more
Very modest base hardware, but understandable relative to the price
HDD injection is very unique, but prevents hot swapping
Still a lack of client applications native to the NAS services for Windows, Mac, Andoid and Linux
Shame about the LCD/LCM control panel being absent
M.2 NVMes are not usable for storage pools, just read/write caching - which is a shame, given the large network connectivity available here

You can buy the UniFi UNAS Pro 8 NAS via the link below – doing so will result in a small commission coming to me and Eddie at NASCompares, and allows us to keep doing what we do! 

UniFi UNAS Pro 8 Review – Design & Storage

The UNAS Pro 8 adopts a 2U rackmount form factor, measuring 442.4 x 480 x 87.4 mm and weighing 11.5 kg. The enclosure is constructed from SGCC steel, giving it a sturdy industrial build aimed at rack deployments rather than desktop placement. The system ships with rack rails included, which is uncommon among turnkey NAS appliances in this class, reducing the need for additional accessories when integrating it into an existing rack setup. The front panel presents a uniform layout of eight drive bays, standardising the design over the previous model’s unconventional seven-bay configuration and providing a more predictable arrangement for enterprise or prosumer storage planning.

Each of the eight bays supports both 3.5-inch and 2.5-inch HDDs or SSDs, with tool-less trays supplied for ease of installation. Drives slot in securely with a lockable motion, though there is no key-based locking mechanism on the trays themselves, limiting physical access protection. Installation is simple, with trays accommodating both large-capacity HDDs and smaller SSDs through included screws for 2.5-inch drives. While the bays can be partially populated for smaller-scale deployments, the absence of an expansion chassis option means users must fully plan around the eight-bay limit from the outset.

Cooling has been reworked compared with the earlier UNAS Pro. The system now features multiple fans with improved airflow across the drive bays and system board, supplemented by passive ventilation at the front and central areas of the chassis. Fan control has been integrated into the management software, allowing administrators to adjust fan speeds dynamically, a feature missing from the 2024 model. This provides more direct management of system acoustics and thermal balance, which is important given that high-density SATA arrays can run warm under sustained load.

In addition to the primary SATA storage, the rear of the chassis houses two M.2 NVMe slots. These are integrated into removable tray modules with thermal pads and heatsinks designed to dissipate heat from 2280 or 22110 length SSDs. However, the trays are not included by default, requiring a separate purchase if users wish to install their own NVMe drives.

The implementation is mechanically well thought out, but functionally limited: the NVMe drives can currently only be used for read and write caching.

They cannot be assigned to storage pools or volumes, restricting their utility for users seeking to leverage them as a high-speed tier alongside the eight SATA bays.

From a capacity perspective, the eight 3.5-inch bays allow the use of large modern drives, with confirmed compatibility during testing with 30 TB Seagate IronWolf units as well as UniFi-branded re-labelled Western Digital drives. The total maximum capacity therefore depends on the drives chosen, but the system power budget allocates up to 175W for drives, sufficient to support a full complement of high-capacity HDDs.

In practice, UniFi recommends their own labelled drives but does not enforce vendor lock-in, leaving flexibility for users to select from available NAS-grade HDDs and SSDs on the market. This more open stance is in contrast to the drive validation policies adopted by some established NAS vendors, and it provides an important degree of freedom in deployment.

UniFi UNAS Pro 8 Review – Internal Hardware

At the core of the UNAS Pro 8 is an ARM-based processor, specifically a quad-core Cortex-A57 running at 1.7 GHz. This architecture is consistent with UniFi’s approach in the earlier UNAS Pro, prioritising efficiency and lower power draw over raw computational performance. The choice of an ARM SoC means the device is well-suited for file storage, backups, and network-attached services, but it does not provide the same level of support for virtualisation, multimedia transcoding, or container workloads that x86-based systems can deliver. For users considering this system, the hardware direction underlines its positioning as a straightforward storage platform rather than an all-purpose server.

Memory is supplied in the form of 16 GB of LPDDR4, which is soldered to the board and cannot be upgraded. This is a relatively high baseline for an ARM-powered NAS, offering enough headroom for multi-user file access, caching operations, and handling larger RAID arrays without memory saturation. The allocation proved sufficient during array synchronisation tests, though high memory utilisation was observed when building an eight-drive RAID. This suggests the hardware has been provisioned carefully to meet expected workloads, albeit without scope for user expansion if requirements increase later.

The operating system is stored internally on dedicated flash storage, reported within the software as 25.2 GB, likely provisioned as a 32 GB module with some over-provisioning. This design ensures that installed drives remain fully dedicated to storage and that the system can boot independently of the data array. Storage management supports multiple RAID levels up to RAID 6, as well as clustered RAID groupings, providing some flexibility for mixed drive sizes. Combined with hot-swap support and optional failover protection through dual PSUs, the hardware configuration strikes a balance between basic efficiency and the inclusion of some enterprise features.

UniFi UNAS Pro 8 Review – Connectivity & Throughput

The UNAS Pro 8 is equipped with three 10-gigabit network interfaces, consisting of two SFP+ 10G ports and one RJ45 10GbE port with multi-gigabit fallback to 5G, 2.5G, 1G, and 100 MbE. This level of connectivity is notable for a system limited to eight SATA bays, as even high-performance HDDs or SSDs in aggregate are unlikely to saturate more than a single 10GbE link under typical workloads.

While the inclusion of three ports may appear excessive, the arrangement allows for link aggregation, redundancy, and separation of traffic across multiple networks. In practice, this provides administrators flexibility in how the NAS integrates with existing switching hardware, though the real-world performance ceiling remains constrained by the storage media.

Power connectivity is handled through two hot-swappable AC/DC 550W power modules, though only one is included in the base configuration. Installing a second unit enables redundancy, ensuring uninterrupted operation in the event of PSU failure. Testing confirmed seamless failover when one module was removed during sustained read/write operations, with no observable disruption in data availability. However, the absence of USB or UPS integration ports limits external redundancy options, leaving users reliant solely on the dual-PSU configuration for power protection.

In terms of general I/O, the device is closed in design, with no USB ports, HDMI output, or PCIe expansion available. This reflects UniFi’s approach of positioning the system as a dedicated, self-contained appliance managed exclusively via network interfaces and the UniFi OS console. While this reduces versatility for use cases such as direct-attached backups or third-party hardware upgrades, it aligns with the brand’s ecosystem-driven philosophy.

Performance testing with eight 8TB drives in a RAID 5 configuration produced throughput in the region of 800–850 MB/s during sequential read operations. Write speeds were lower, reflecting both the RAID type and the limitations of the ARM Cortex-A57 processor, but still sufficient for multi-user file access and standard NAS workloads. Tests with larger 30TB Seagate IronWolf drives confirmed compatibility, though extended stress testing was not undertaken. With SATA SSDs or a RAID 0 array, the system would likely be capable of saturating a single 10GbE connection, though fully exploiting the three available ports remains unrealistic under the current hardware constraints.

The inclusion of two M.2 NVMe slots, limited to use as read/write cache, provides some performance enhancement. Caching can accelerate frequently accessed data reads or speed up ingest of new data before it is written to the HDD array. However, the caching mechanism is automated, with no user control over cache policies, and the NVMe drives cannot currently be used for storage pools. During operation, thermal imaging recorded SSD module temperatures in excess of 50°C, indicating adequate but stressed cooling under load. This reinforces the importance of active fan management, now included in UniFi’s updated software.

• Networking: 2 x 10G SFP+, 1 x 10GbE RJ45 (5G/2.5G/1G/100M supported)

• Power Supply: 2 x 550W hot-swappable AC/DC modules (1 included)

• Management: Ethernet and Bluetooth 4.1 setup/admin

• Other I/O: None (no USB, HDMI, or PCIe expansion)

• Drive Support: 8 x 2.5″/3.5″ SATA HDD/SSD, 2 x M.2 NVMe (cache only)

• Tested Performance: ~800–850 MB/s sequential reads (RAID 5, HDDs)

• Write Performance: Lower than reads, limited by ARM CPU overhead

• Cache Functionality: NVMe SSDs limited to automated read/write caching

UniFi UNAS Pro 8 Review – Software and Services

The UNAS Pro 8 runs on UniFi’s NAS management platform, designed to integrate with the broader UniFi ecosystem while remaining usable as a standalone system. Administration can be carried out through the UniFi OS console in a web browser or via the ui.com cloud portal, with optional remote access that can be enabled or disabled depending on security requirements.

The platform aims to provide a single interface for storage management, user access, and system monitoring. It is less feature-rich than mature alternatives such as Synology DSM or QNAP QTS, but it retains a streamlined design that prioritises ease of setup and centralised administration.

Storage management supports common RAID levels up to RAID 6, with the additional ability to cluster groups of drives into combined pools. Snapshots are available at the folder level, allowing users to roll back to earlier revisions of files. Encryption is supported, requiring a password to mount encrypted volumes after reboot, which ensures data protection in the event of device theft or unauthorised access.

NVMe SSDs can be assigned to caching, though as noted earlier, they cannot be added to storage pools. File access is available through SMB and NFS, but the range of supported protocols is narrower than on established NAS operating systems.

Backup functionality is split into two categories: system configuration backups and file-level backups. System configuration backups can be stored locally or uploaded to a ui.com account, allowing settings and structures to be restored to the same or another UniFi NAS device.

File-level backups extend to cloud services and other NAS units, with support for scheduled routines and basic rules such as overwrite or versioned backups. Cloud integration is functional but limited compared to established platforms, and external synchronisation features such as continuous sync or third-party plug-ins are not yet available.

User management is relatively straightforward, with the option to bind accounts to the wider UniFi ecosystem or create standalone local users. Access can be restricted to LAN-only connections, while two-factor authentication is available through UniFi’s identity and verification tools. At present, some advanced functions common to other platforms, such as iSCSI target creation or scheduled power management, remain absent.

The software continues to evolve, with updates adding features incrementally, but its current focus is on providing reliable core storage, backup, and access management rather than competing directly with the broad feature sets of long-established NAS vendors.

UniFi UNAS Pro 8 Review – Verdict and Conclusion

The UniFi UNAS Pro 8 represents a measured but important step forward compared with the earlier UNAS Pro model released in 2024. By moving to a uniform eight-bay arrangement, it avoids the odd seven-bay design that limited the practicality of the previous system and brings it in line with industry expectations for rackmount storage. The addition of dual hot-swappable power supply modules, though only one is supplied by default, introduces a level of redundancy that was absent in the earlier generation and proved reliable during testing with seamless failover. Improvements to cooling and fan control further distinguish it, with administrators now able to actively manage system noise and temperature rather than relying on fixed presets. UniFi has also bundled rack rails and a robust accessory kit, which simplifies installation and deployment. At the same time, the reliance on an ARM Cortex-A57 processor keeps the platform efficient but restricts its performance ceiling, limiting its suitability for high-throughput tasks such as large-scale virtualisation, multimedia transcoding, or environments where sustained multi-gigabyte per second throughput is essential.

On the software side, UniFi’s NAS operating system has matured since the first-generation release but still prioritises simplicity over feature breadth. The UNAS Pro 8 includes key storage capabilities such as RAID up to level 6, clustered pools, snapshots, encryption, and read/write caching via the rear-mounted NVMe modules. However, those same M.2 slots remain limited to caching only, and the trays required for installation must be purchased separately, which may be seen as an unnecessary barrier. Network protocol support is limited to common services such as SMB and NFS, with no iSCSI implementation, reducing its appeal for professional editing environments or enterprise applications that depend on block-level storage. Cloud and LAN backups are supported with basic scheduling and rules, but the absence of broader synchronisation features or third-party integration keeps it behind more mature platforms. The Pro 8 therefore delivers dependable core NAS functions but does not yet challenge the established ecosystems of Synology or QNAP. For organisations already invested in UniFi’s infrastructure or those requiring a straightforward rackmount storage system with multiple 10GbE connections, it offers a compelling option, but it remains best suited to use cases focused on file storage and backup rather than advanced workloads.

You can buy the UniFi UNAS Pro 8 NAS via the link below – doing so will result in a small commission coming to me and Eddie at NASCompares, and allows us to keep doing what we do! 

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The UniFi UNAS 2 NAS Review – Value vs Scale

Note, the UNAS Pro 2 is NOW LIVE on the UniFi Store . The UNAS 4, UNAS Pro 4 and UNAS Pro 8 are now in the site, but are not available till October / Q4 2025

The UniFi UNAS 2 is a compact, entry-level two-bay desktop NAS introduced as part of Ubiquiti’s second phase of NAS development, following the debut of the UNAS Pro in 2024. That earlier seven-bay rackmount system was notable for its low $499 price and integrated 10GbE connectivity, but it had an unconventional design, limited fan control, and no support for USB expansion. By contrast, the UNAS 2 shifts away from rackmount hardware and into the desktop market, adopting a much smaller form factor and prioritising simplicity over raw performance. Measuring 13.5 x 12.9 x 22.37 cm and weighing only 1.3 kg, it is one of the smallest systems in the UniFi NAS range and is constructed from polycarbonate rather than steel, reinforcing its role as an affordable, lightweight device.

The hardware is designed primarily for modest storage requirements, supporting two 3.5-inch hard drives with a maximum combined power budget of 52W and an overall consumption ceiling of 60W. The device operates on a single 2.5 GbE RJ45 interface, which also functions as a PoE++ input, removing the need for a conventional power supply unit but requiring either a compatible PoE++ switch or the included 60W injector. This approach marks a clear departure from the UNAS Pro, which included a standard power connector and optional redundancy through additional PSU modules. In practice, the reliance on a single port for both power and data streamlines installation within UniFi networks, but it also introduces a single point of failure and reduces flexibility compared with larger systems.

UniFi UNAS 2 Review – Quick Conclusion

The UniFi UNAS 2 is a compact, entry-level NAS that prioritises simplicity and integration within the UniFi ecosystem over flexibility or raw performance. Its use of PoE++ for both power and connectivity makes installation straightforward in environments with compatible UniFi switches, but it introduces reliance on a single port and limits deployment outside that infrastructure, even with the included injector in the retail kit. The system supports two 3.5-inch drives in a shared non–hot-swappable tray, with RAID 0, RAID 1, or single-disk setups available, but there is no option for expansion or NVMe caching. Hardware consists of a quad-core ARM Cortex-A55 processor with fixed 4 GB of LPDDR4 memory, which is efficient but imposes clear limits on throughput and application scope. Performance testing produced read speeds up to 260 MB/s and writes in the 160–180 MB/s range, sufficient for the 2.5 GbE interface but reflective of the modest hardware and thermal constraints, with CPU temperatures often approaching 80°C under load. Software provides a clean interface with snapshots, RAID tools, backups to other UniFi NAS or cloud services, and user management tied to UniFi identity, but features such as iSCSI, encryption, and granular backup rules are absent. As a result, the UNAS 2 is best suited as a secondary or edge storage device, particularly for UniFi users seeking easy integration, but it lacks the scalability and depth of established NAS platforms needed for primary or enterprise deployments.

BUILD QUALITY - 9/10

HARDWARE - 7/10

PERFORMANCE - 7/10

PRICE - 10/10

VALUE - 9/10

8.4

PROS

Benefits from almost a year of development of the UNAS Pro by UniFi, resulting in a much more complete solution in both hardware and software
Exceptionally appealing price point
Extremely low impact (power use, noise level, physical scale all great)
Introduction of USB C 5Gb/s Connectivity is very welcome
Supports complete network/local access if preferred, as well as full remote connectivity with the UI.com account and site manager services
Wide Hard Drives and SATA SSD Support (UniFi branded drives and those from 3rd parties such as Seagate Ironwolf, WD Red and Toshiba N300)
Comprehensive network storage software in UniFi NAS OS and Drive.
Latest OS updates have included fan control, flexible RAID configurations, encrypted drive creation, customizable snapshots, more backup client choices/targets
\'Single Pane of Glass\' management and monitoring screen is very well presented!
One of the fastest to deploy turnkey NAS solutions I have ever personally used!

CONS

Single network port, though not a dealbreaker (as this is still just 2x SATA throughput), is not great in terms of a network failover or in deployment of SATA SSDs
Choice of PoE deployment unusual and limits some deployments
USB C connectivity does not support network adapters, NAS expansions or 3rd party UPS devices
Very modest base hardware, but understandable relative to the price
HDD injection is very unique, but it prevents hot swapping
Still a lack of client applications native to the NAS services for Windows, Mac, Android and Linux

You can buy the UniFi UNAS 2 NAS via the link below – doing so will result in a small commission coming to me and Eddie at NASCompares, and allows us to keep doing what we do! 

UniFi UNAS 2 Review – Design

The UNAS 2 adopts a small desktop form factor, measuring 135 x 129 x 223.7 mm and weighing 1.3 kg. Its enclosure is constructed from polycarbonate, which makes it lighter and less industrial than the steel-based rackmount models in UniFi’s NAS range. The compact build is suited for environments where space is limited, and it operates within an ambient temperature range of -5 to 40°C and a humidity tolerance of 10–90% non-condensing. With only two drive bays, the UNAS 2 positions itself as an edge device for simple storage and backup, rather than a primary data management system.

Drive installation is handled through a single removable cage that holds both 3.5-inch drives. Each drive clips into place using a shared tray design, with both units inserted in opposite orientations to align with the SATA connectors. While this arrangement is functional, it has some limitations.

There is no support for hot swapping, meaning the system must be powered down before drives can be replaced. Additionally, the shared cage design requires both drives to be handled together, which increases the risk of disturbing a healthy drive when removing or replacing a failed one.

Cooling is managed by a small fan located at the rear, supported by passive ventilation channels at the base of the unit. Air is drawn in from underneath and expelled from the top section, ensuring airflow across the drives and the system board. Thermal tests recorded CPU temperatures in the range of 75–80°C during higher utilisation, with the chassis surface reaching around 39–50°C depending on workload.

The fan is adjustable via UniFi’s management interface, offering a choice between balanced operation and higher cooling at the expense of noise.

Noise levels ranged from 31–32 dBA in idle to 35–38 dBA under load, influenced heavily by the vibration of installed drives.

At the front of the unit, UniFi has integrated a 1.47-inch colour LCM display for system information. This provides basic details such as network status, storage health, and system alerts, but it is not touchscreen and cannot be used for configuration.

The lack of interactive control means that most management tasks still need to be handled through the UniFi OS console. LED indicators are also present for system status, and a physical locking mechanism is built into the drive cage, preventing accidental removal.

From a storage perspective, the UNAS 2 supports standard RAID configurations for two drives, namely RAID 0 and RAID 1, in addition to single-disk setups. Given the limitations of two-bay devices, RAID 1 is the most practical option, prioritising data protection over capacity.

The system officially supports large-capacity HDDs, with tests confirming compatibility up to 30 TB drives. However, there is no expansion capability through additional enclosures, and the single USB-C port on the front is limited to attaching external drives for storage or backups. This means users are confined to the internal two-bay maximum, making long-term planning important for deployment.

UniFi UNAS 2 Review – Internal Hardware

The UNAS 2 is built around a quad-core ARM Cortex-A55 processor clocked at 1.7 GHz. This CPU architecture is designed for efficiency rather than high computational output, which makes it suitable for low-power storage operations, but less capable for advanced workloads such as virtualisation, heavy encryption, or on-the-fly media transcoding.

During testing, CPU temperatures generally remained in the 75–80°C range under sustained use, dropping closer to 50–60°C when idle or under light activity. While these figures fall within operating limits, they reflect the modest cooling design of the enclosure and the limited thermal headroom of the ARM-based hardware.

The device includes 4 GB of LPDDR4 memory, which is soldered to the board and cannot be expanded. This fixed allocation is sufficient for handling RAID 1 synchronisation, snapshots, and standard multi-user file operations, but it sets a ceiling on the system’s multitasking capability.

Unlike larger UniFi NAS models that feature 16 GB of memory, the UNAS 2’s hardware is intended only for light to moderate workloads. Memory use during testing reached high utilisation during RAID synchronisation but did not exceed available capacity, suggesting that UniFi has provisioned enough for the intended use case, while keeping the system constrained to its role as an entry-level solution.

The operating system is stored internally and runs independently of the installed drives, leaving both bays available for data. This separation ensures that the system can still boot even if both drives are removed or replaced. Storage management is limited to the basic RAID levels supported by two-bay systems, and no M.2 NVMe slots are included for caching or tiered storage, a feature reserved for larger UniFi NAS models. As such, the internal hardware of the UNAS 2 reflects its role as a secondary or edge device, designed primarily for straightforward storage and backup within a UniFi-managed network.

UniFi UNAS 2 Review – Connectivity & Performance

The UNAS 2 relies on a single 2.5 GbE RJ45 port for both data and power, with PoE++ providing up to 60W of combined budget. This integration reduces cabling and eliminates the need for an external power brick, but it introduces a single point of failure. That said, the UNAS 2 retail kit DOES include a PoE mains adapter, so ultimately the end user does have the option of deploying in a traditional manner (though power and network connectivity are still funnelled into the same connector).

If the cable or port fails, both power and connectivity are lost. A 60W PoE++ injector is included in the package for users without a compatible PoE++ switch, but this approach remains less flexible than traditional dual-port NAS designs. There is no secondary network interface, Wi-Fi connectivity (rare in a system of this scale, but would allow for failover if it was), support of a USB network adapter or option for link aggregation, which makes the system dependent on one connection for all network and power needs.

In addition to the Ethernet port, the front of the device includes a USB-C interface rated at 5 Gbps. This provides the ability to attach external storage devices, enabling data import, backups, or temporary storage expansion. However, the USB port is limited to storage and does not support network adapters, UPS integration, or official expansion enclosures. While the addition of USB-C addresses one omission from the UNAS Pro, its functionality is constrained and focused solely on external drive access.

Network throughput reflects the limitations of a dual-drive ARM-based NAS. In testing with two 8TB HDDs in RAID 1, sequential read speeds reached around 260 MB/s, while write speeds varied between 160–180 MB/s depending on workload. Benchmarks such as AJA and CrystalDiskMark confirmed this pattern, with read performance consistently higher than write due to the processor’s handling of RAID and data caching. These figures make effective use of the 2.5 GbE interface but leave no capacity to challenge higher multi-gigabit standards.

Power consumption aligns with UniFi’s published specifications, averaging 16–17W in idle, 18–20W during light activity, and 23–24W under heavier use. Peak usage during sustained transfers with RAID synchronisation reached approximately 25W, well below the 60W ceiling. Thermal monitoring showed the CPU rising toward 79–80°C under stress, though the chassis fan helped bring temperatures back into the 50–60°C range once load reduced. These results indicate that while the system operates within its defined limits, sustained workloads push the ARM processor and cooling system close to their maximum operating range.

Noise levels were modest, with idle operation producing around 31–32 dBA and workloads raising this to 35–38 dBA. The shared dual-drive cage design contributed to additional vibration, particularly when placed on a hard surface. Rubberised feet help dampen this effect, but vibration noise was noticeably reduced when the device was placed on softer material such as foam. Overall, while the system remains relatively quiet, its acoustic profile is closely tied to the drives selected and the surface it rests on.

• Network Interface: 1 x 2.5 GbE RJ45 (PoE++)

• USB Ports: 1 x USB-C (5 Gbps, storage only)

• PoE Power Budget: 60W (52W available for drives)

• Power Supply: 60W PoE++ injector included

• Max Consumption: 60W (typical 16–25W during use)

• Tested Performance: ~260 MB/s reads, 160–180 MB/s writes (RAID 1, HDDs)

• Noise Levels: 31–32 dBA idle, up to 38 dBA under load

• Temperature Range (Observed): 75–80°C CPU under stress, 50–60°C idle/light use

UniFi UNAS 2 Review – Software and Services

The UNAS 2 runs on UniFi’s NAS management platform, which follows the same single-pane-of-glass interface design seen in the UNAS Pro and UNAS Pro 8. Administration is carried out via a web browser or through a ui.com account, with the option to disable cloud access and operate the system entirely on a local network.

The interface consolidates system status, storage health, user accounts, and backup management into one dashboard. While straightforward to use, it does not provide the same level of customisation or feature depth offered by longer-established NAS operating systems such as Synology DSM or QNAP QTS.

Storage management is limited by the two-bay architecture. Users can create RAID 0 or RAID 1 volumes, or operate drives independently. Drive health monitoring, temperature reporting, and snapshot scheduling are all included, allowing basic resilience and file recovery options.

Snapshots can be created and managed at the folder level, with the ability to lock snapshots to prevent deletion. Encryption, however, does not appear to be available on the UNAS 2, in contrast to larger UniFi NAS models where encrypted volumes are supported.

Backup functionality includes both system configuration and file-level options. Configuration backups can be stored locally or uploaded to a ui.com account, allowing the system to be restored quickly if reset or replaced. File-level backups extend to other UniFi NAS systems and selected cloud services, including Google Drive, with scheduling available for automation.

Local LAN backups to other storage devices via SMB are also supported, though filtering and exclusion rules are limited. The system is therefore capable of basic backup routines but lacks the more granular tools available on competing platforms.

User and access management is integrated into the UniFi ecosystem. Administrators can create local accounts or bind accounts to UniFi’s identity services, with two-factor authentication supported via the UniFi Verify app.

Permissions can be set at the folder level, and users can be restricted to LAN-only access if required. Supported protocols include SMB and NFS, but there is no iSCSI target functionality, limiting its application in virtualisation or editing workflows.

The software also includes fan control and system monitoring tools, but resource reporting is basic, with only CPU and memory utilisation graphs available.

Overall, the software reflects UniFi’s effort to balance simplicity with integration, but it remains less comprehensive than that of established NAS vendors.

UniFi UNAS 2 Review – Verdict and Conclusion

The UniFi UNAS 2 is presented as a compact and affordable two-bay NAS designed for straightforward storage and backup tasks, particularly within environments already using UniFi networking hardware. Its PoE++ design is distinctive, allowing both power and connectivity to be delivered over a single cable, simplifying installation where compatible PoE switches are available. This approach aligns with UniFi’s strategy of reducing external hardware requirements, though it also means that a failed port or damaged cable will disable both power and network access simultaneously. For non-UniFi users, the reliance on PoE++ creates an additional barrier, as adoption requires either compatible infrastructure or the included 60W injector. The shared dual-drive tray, lack of hot-swap support, and absence of expansion options further reinforce the system’s role as a fixed-capacity solution, best suited to smaller or secondary deployments. With a maximum drive budget of 52W and overall consumption limited to 60W, the device is power-efficient, but its architecture prioritises simplicity over flexibility.

On the software side, the UNAS 2 provides a user-friendly interface with access to snapshots, RAID configuration, system backups, and integration into the UniFi identity ecosystem. However, the limited hardware constrains the range of features available, and certain tools seen in UniFi’s larger NAS models are absent, such as encrypted volumes or extended network protocol support. Performance testing showed sequential read speeds up to 260 MB/s and write speeds around 160–180 MB/s, which make full use of the 2.5 GbE interface but leave little headroom for more demanding tasks. Thermals during extended use regularly pushed the CPU into the high 70s Celsius, and although fan management can be adjusted, sustained workloads highlight the limits of the system’s cooling design. The software’s omission of iSCSI and advanced backup filters also narrows its role, making it less competitive against established vendors in professional or virtualisation scenarios.

Ultimately, the UNAS 2 is most appropriately positioned as an edge or secondary NAS, providing basic networked storage for existing UniFi users who value plug-and-play deployment and ecosystem consistency, but it is not equipped to serve as a primary system in larger or more demanding environments (VMs, Containers, etc). A great and unique NAS that will nbe at it’s most appealing if you are already invested in the UniFi ecosystem, or have a NAS already that needs a network backup.

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UniFi USB4/TB4 to 10GbE Adapter Review

Given the preponderance of 10 Gb Ethernet solutions available in the UniFi portfolio, it’s actually kind of weird that the brand has waited until almost halfway through 2025 to launch a convenient USB to 10G NIC adapter. To put it into perspective, the first generation of Thunderbolt to 10 GbE adapters arrived way back in 2018 from brands such as QNAP, StarTech, and Akitio. Despite this, however, there is still increasing demand for these convenient 10G upgrade alternatives to desktop PCIe card options, due to the growing support of USB4 client hardware, as well as its backwards compatibility with Thunderbolt 3 and Thunderbolt 4. This means that even particularly modest mini PCs and laptops now have the opportunity to scale up towards 10G easily. So, what exactly sets this new adapter from UniFi apart from the already quite oversaturated market of Thunderbolt/USB to 10 GbE adapters? Is it just the same thing with their own badge on top? Does it deserve your money and your data?

UniFi USB4 and TB4 to 10GbE Adapter Review – Quick Conclusion

UniFi have not really reinvented the wheel here. They were not the first to roll out Thunderbolt/USB 10G network adapters, and they certainly won’t be the last. It’s still a little confusing why it took the brand this long to roll out its own convenient accessory, but at least they’ve launched it with the latest controller on board—leading to a great deal more flexibility in its deployment on different client hardware, as well as reduced power consumption compared with the first generation of such adapters. The price of $199 lands pretty squarely between more cost-effective options in the market right now that use the previous generation controller, and the new generation of adapters arriving from brands like QNAP that feature the same hardware architecture as the UniFi option but are around $50 to $100 more. The design of this adapter is smaller and lighter than other options in the market by quite some margin, and as it is bus-powered and has no active cooling, the device is eminently portable and low-impact. All that said, it lacks the ridging and venting of other options in the market. Equally, we are on the cusp of just how big the evolution of USB4 network controllers is soon to become, and later this year we are likely to see the first generation of USB4 to 25G or 2x10GbE adapters arrive—clearly, these will scale in cost and won’t arrive for a great deal of time, but for those looking at this adapter as a means of future-proofing, you may well see the benefits in holding out a little bit longer. Nevertheless, UniFi have again released a great, solid network adapter here that does nothing wrong, and although they’ve arrived a little late to the party on this one, it’s still a very solid offering.

UniFi USB4 and TB4 to 10GbE Adapter Review – Design

As I’ve already mentioned, there are already a decent number of USB-C to 10 GbE network adapter options in the market, and given UniFi’s unique design choices, I’m always interested to see how Ubiquiti goes about designing their own version of something that the market already has—but more importantly, what exactly are they bringing to it that doesn’t already exist in the marketplace.

In the case of this adapter, the main three things that this adapter seemingly introduces over the status quo are:

• Their adapter is smaller in size and lighter in weight than pretty much every other adapter in the market for 10 GbE via USB-C.

• Their adapter has a lower power consumption than practically all other USB-C to 10 GbE Ethernet adapters.

• Their adapter uses a much more up-to-date and recent controller than any other Thunderbolt to 10G adapter released before 2025.

Those first two points are going to be very attractive to users who have been weighing up the need to buy an adapter over the last few years that connects via USB-C, but we are going to have to drill down a little bit later into why that third point is quite important to users with older generation equipment. But we’ll get back to that later.

The adapter is pretty damn small, as its completely metal external chassis is fanless. The adapter relies heavily on a controller-mounted heatsink internally that is connected to a thermal pad attached to the external metal casing. The USB Type-C input provides both data and power via a single interface, and this adapter supports Thunderbolt 3, Thunderbolt 4, and USB4. That also means that it will most certainly work with future generations of USB and the slowly rolling-out Thunderbolt 5 protocol. Crucially though, it’s worth noting that this adapter does not support USB 3.2 Gen 1 or Gen 2—domestic USB that a lot more value devices either exclusively have or the port that is more commonly found on everything else. So, despite the 5 to 7-year release difference between this adapter and the first generation of Thunderbolt to 10 Gb Ethernet USB bus-powered adapters, compatibility on especially legacy equipment is not guaranteed.

It is also worth touching on that adapters like this are chiefly designed for users that have client hardware that cannot support a traditional PCIe upgrade card for adding improved network interfaces. If you have the facility to add 10 Gb Ethernet via a PCIe slot, I would always recommend that instead of an adapter like this. It will end up being far more power efficient and considerably lower in price. But for those in a pinch that need a portable and easy-to-adopt network upgrade on their system, this is a great choice.

If you are in the market for improved network connectivity and 10 GbE is a bit too rich for your blood or your needs, you can still get hold of incredibly cost-effective USB to 5 Gb Ethernet adapters for as little as $30 right now. They also allow connectivity with legacy USB 3.2 connections as well. So, if you don’t actually need full 10 GbE, and your switch supports auto-negotiation with 5 GbE, you could save a bunch of money.

Check Amazon for a $30 USB to 5GbE Adapter HERE – Check AliExpress for $30 USB-to-5GbE Adapter HERE

Do keep in mind that there are affordable USB to 5 GbE adapters in the market. I’m actually kind of surprised that UniFi haven’t integrated a USB to 5 Gb Ethernet adapter into their lineup already, as there is definitely a growing demand for this middle choice in network connectivity at the home and prosumer level—especially as more routers and network switches roll out with both 2.5 GbE and 5 GbE support.

UniFi USB4 and TB4 to 10GbE Adapter Review – Hardware

The physical connection on the other side of this UniFi adapter is a 10GBASE-T copper connection. This is generally perfect up to about 20 meters, and although you can use it over longer distances, at that point you tend to experience some resistance and a drop in latency. A fiber SFP option would have been great, but if they were only going to launch one version—now or ever—almost certainly the one users would want for convenience is going to be the copper option. The adapter also supports auto-negotiation as you’d expect, and although some client hardware will require you to install the AQC113 driver, it is broadly available for the majority of platforms ranging from Windows to Mac and custom Linux builds. That said, support in most open-source NAS software is still a little patchy.

In terms of performance, I’m pleased to say that when connecting with a 10 GbE NAS system via a 10G copper switch, this adapter comfortably hit 10 GbE saturation very easily. Consistent testing by CrystalDisk and AJA using a NAS equipped with a 10 GbE port and SSDs allowed this adapter to run consistently with repeated 1 GB tests over 10 GbE for 15 minutes with sustained performance. Clearly, the performance you’re going to achieve with an adapter like this will be heavily based on both the network activity and the target IP device, but even this limited testing showed that this adapter is more than capable of hitting those performance numbers.

When the adapter was running full-flow, and after 10 minutes of sustained use, it was hitting around 44 to 45°C. When idle, the adapter rested at around 40°C when not in use. One slight complaint I had was that the adapter did not especially quickly dissipate the gathered heat during testing—and that didn’t come as a huge surprise. As this adapter lacks any active cooling system internally, lacks the ridged heatsink design of a lot of other USB-to-10G adapters on the market, and is notably more compact than other options, it was inevitable that temperatures might get a little spicy. Nevertheless, I am a little disappointed at how slowly heat was dissipated between uses, and that is sadly a price many users who want a compact adapter like this are going to have to pay.

Now I want to discuss the network controller inside this UniFi USB4-to-10G adapter, as I think it’s going to be an important area of distinction for buyers considering this new $200 10G adapter versus cheaper or more expensive alternatives that have been in the market for more than 5 years. The first generation of Thunderbolt-to-10G adapters that arrived way back in 2018/2019 featured the AQN-107 controller. This was designed exclusively for Thunderbolt connections and was a controller running on a PCIe Gen 3 x4 mounted connection in those adapters. This more modern controller is the AQC113, and alongside arriving in a smaller physical size with lower power consumption, it crucially runs on a flexible PCIe Gen 3/4 x1, x2, or x4 architecture as needed.

The reason this is important is that when Thunderbolt 4 and USB4 arrived on client hardware as more flexible and affordable alternatives to Thunderbolt 3, it also allowed client hardware creators to be a little bit more flexible on the allocated PCIe lanes that they would dedicate to USB4/Thunderbolt 3. As good as all this sounds, that meant that more modern hardware with USB4/TB4 (which is backwards compatible with TB3) often had much poorer or inconsistent performance when using the older generation TB3 10G adapters—because the adapter wasn’t flexible enough to adapt to the more dynamic deployment of USB4/TB4 on modern hardware. That is why the new controller and its flexibility may well run consistently better and more efficiently on modern hardware, as both the client and the adapter are more flexibly positioned to adapt to the unique deployments they may encounter.

Several of the existing USB-C to 10G network adapters in the market released over the last 5 years are soon to be updated with newer controllers (with QNAP recently upgrading their existing adapter with the new controller and increasing the price from $199 to $249 already). This is why I touched on earlier the importance of UniFi choosing the newer-gen controller for their adapter. It ensures far greater compatibility with modern USB4/TB3 architecture, as well as better flexibility for users on older-generation devices.

UniFi USB4 and TB4 to 10GbE Adapter Review – Verdict & Conclusion

Unless you properly dig down into just why both the internal hardware and the necessity for a device like this exist, chances are there are a lot of traditional 10G users who are going to question why you’d spend $200 on a USB adapter when there are cheaper and more power-efficient PCIe options on the market. Equally, there are going to be those who’ll point at UniFi releasing this adapter in 2025 and—without looking into how the hardware in these adapters has changed—will question why it took UniFi so long to jump on this bandwagon. To both of those kinds of users, I think they are either missing the point or need to spend a little bit more time looking at how this kind of technology has both changed and evolved for the better in the last few years. The original hurdles for users to scale up their network connectivity have evolved rapidly, and now even the most basic low-powered and low-priced Chromebook is not incapable of scaling up towards 2.5G and 5G network connections. Equally, as Thunderbolt and USB continue their tit-for-tat upgrades periodically, the network peripherals available to most users are evolving just as quickly. This new adapter takes advantage of the continued miniaturization of a lot of those components—and their growing comparative affordability.

I genuinely and wholeheartedly recommend the UniFi USB4 to 10 Gb Ethernet adapter. I also want to add that there are cheap alternatives in the market—if you’re a Thunderbolt 3 user, there are much cheaper alternatives for 2.5G and 5G. If you only have USB 3.2, those are also options to consider. And finally, keep your eyes on the end of 2025, as the controllers that made this adapter possible are going to start rolling out towards dual 10G and 2.5G solutions in due course. They will, of course, scale up in price too, but if you’re looking at this adapter for the sake of future-proofing rather than immediate deployment, you might want to hold off a little while longer. For everyone else, this is a fantastic and convenient network upgrade for content creators and prosumers alike.

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This description contains links to Amazon. These links will take you to some of the products mentioned in today's content. As an Amazon Associate, I earn from qualifying purchases. Visit the NASCompares Deal Finder to find the best place to buy this device in your region, based on Service, Support and Reputation - Just Search for your NAS Drive in the Box Below

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If you like this service, please consider supporting us. We use affiliate links on the blog allowing NAScompares information and advice service to be free of charge to you.Anything you purchase on the day you click on our links will generate a small commission which isused to run the website. Here is a link for Amazon and B&H.You can also get me a Ko-fi or old school Paypal. Thanks!To find out more about how to support this advice service check HEREIf you need to fix or configure a NAS, check Fiver Have you thought about helping others with your knowledge? Find Instructions Here  

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