The AOOSTAR WTR Pro is one of those mini PCs that doesn’t really fit neatly into the traditional mini-PC category. Instead of simply shrinking a desktop computer into a small box, AOOSTAR has built the WTR Pro around a much more interesting idea: combining a capable mini PC with a four-bay NAS enclosure.
That makes it particularly attractive to home-lab enthusiasts, Plex users, small businesses, self-hosters, and anyone who wants one compact machine to handle storage, virtualization, networking, and everyday computing.
Depending on the configuration, the WTR Pro is available with processors including the AMD Ryzen 7 5825U or lower-power Intel N-series chips. The AMD version offers eight cores and 16 threads, while the chassis provides four SATA bays, two M.2 NVMe slots, two 2.5GbE ports, and multiple display and USB connections.
The result is an unusually flexible machine, although that flexibility comes with a few compromises—particularly around software, support, and long-term reliability.
Design and Build Quality
The WTR Pro looks more like a small NAS server than a conventional mini PC.
That’s actually a good thing.
The chassis measures approximately 22.8 × 15 × 18.5cm and weighs around 5kg, according to AOOSTAR’s current specifications.
The relatively tall enclosure provides enough internal space for four 3.5-inch or 2.5-inch SATA drives while still maintaining a reasonably compact footprint.
The four drive bays are the star of the design.
Instead of attaching external USB hard drives to a tiny computer, you can install multiple internal drives and build a proper storage array.
The result is considerably cleaner and more practical for a permanent home server.
Four-Bay Storage
The WTR Pro’s biggest selling point is undoubtedly its four SATA drive bays.
AOOSTAR specifies support for four 2.5/3.5-inch SATA drives, with configurations advertised for very large total capacities. The current Ryzen version also provides two M.2 2280 NVMe slots for fast storage.
This gives you several possibilities.
You could use:
- Four large HDDs for bulk storage
- SSDs for a quieter NAS
- NVMe storage for applications and virtual machines
- HDDs for media and backups
- A mixture of fast and high-capacity storage
That flexibility makes the WTR Pro much more interesting than a conventional mini PC.
It can effectively function as your desktop/server, NAS, media server, and home-lab machine at the same time.
Ryzen 7 5825U Performance
The AMD version uses the Ryzen 7 5825U, an eight-core, 16-thread processor with boost speeds up to 4.5GHz.
Although this isn’t a current-generation processor, it remains surprisingly capable.
For everyday desktop work, it has more than enough CPU performance.
It is also well suited to:
- File serving
- Docker containers
- Plex/Jellyfin
- Home Assistant
- Virtual machines
- Development environments
- Lightweight server applications
- Remote desktop
- Office applications
- Web browsing
Notebookcheck’s testing found the Ryzen version substantially more capable than the low-power Intel configuration, particularly for demanding NAS workloads and virtualization.
If you’re buying the WTR Pro specifically because you want a powerful home server, the Ryzen configuration is the one I’d favor.
Intel N-Series Version
AOOSTAR also offers lower-power Intel versions of the WTR Pro.
These are considerably less powerful than the Ryzen model but have one important advantage: lower power consumption.
For a NAS that primarily needs to store files, run backups, provide network shares, and perform light media-server duties, the Intel version can make sense.
Notebookcheck’s testing concluded that the Intel configuration is better suited to basic NAS tasks, while the Ryzen 7 5825U provides significantly more headroom for demanding applications and virtualization.
So the choice is fairly straightforward:
Intel = efficiency and basic NAS workloads.
Ryzen = considerably more performance and versatility.
RAM Expandability
The Ryzen model has two DDR4-3200 SO-DIMM slots and supports up to 64GB of memory according to AOOSTAR.
That’s excellent for a home-lab machine.
A basic NAS may be perfectly happy with 16GB, but additional memory becomes useful when running multiple containers or virtual machines.
For example, you could run a storage operating system alongside Docker services, a media server, Home Assistant, and other applications without immediately running out of memory.
This is one of the areas where the WTR Pro feels much more like a small server than a typical consumer mini PC.
NVMe Storage
The Ryzen version includes two M.2 2280 PCIe 3.0 NVMe slots, with AOOSTAR listing support for capacities up to 8TB.
This is an excellent complement to the four SATA bays.
You could use the NVMe drives for:
- Operating system
- Virtual machines
- Docker containers
- Application data
- Cache
- Fast working storage
while keeping the larger SATA drives dedicated to bulk data.
That separation can significantly improve the overall responsiveness of a home server.
Networking
The WTR Pro has two 2.5GbE Ethernet ports.
This is another major advantage.
A conventional 1GbE NAS can become a bottleneck when several clients are transferring large files simultaneously.
With 2.5GbE, the WTR Pro has considerably more network bandwidth available.
The dual ports also open up interesting possibilities for networking enthusiasts.
You could use one connection for your primary LAN and another for a separate network, router, virtualized firewall, or direct connection.
The Intel I226-V network controllers are used on configurations reviewed by independent testers.
For a home lab, two 2.5GbE ports are a genuinely useful feature.
Video Outputs
Despite being designed as a NAS, the WTR Pro can also function as a normal desktop PC.
The Ryzen version provides:
- HDMI 2.1
- DisplayPort 1.4
- USB-C with DisplayPort support
AOOSTAR specifies support for high-resolution displays, including 4K at high refresh rates through the appropriate outputs.
This means you aren’t forced to administer the machine exclusively through a web interface or SSH.
You can connect a monitor and keyboard directly and use it like a conventional computer.
That’s particularly useful when setting up a new operating system.
Software Flexibility
One of the WTR Pro’s most interesting characteristics is that you’re not locked into a proprietary NAS operating system.
The hardware supports normal boot configuration through UEFI, and independent testing found that the device allows users to choose their own operating system.
That opens the door to systems such as:
- TrueNAS
- Unraid
- Proxmox
- Windows
- Linux
- Ubuntu
- Debian
- Other server distributions
For enthusiasts, this is a huge advantage.
You’re buying flexible hardware rather than a closed NAS appliance.
The downside is that you’re also responsible for configuring it.
TrueNAS and Unraid
The WTR Pro is particularly appealing for TrueNAS and Unraid users.
A four-drive chassis gives you plenty of options for redundancy and storage management, while the NVMe slots can be used for applications or high-speed storage.
Community users have reported successful WTR Pro installations with TrueNAS and Unraid, including systems using four large hard drives.
That said, compatibility isn’t the same thing as official enterprise-grade support.
You’re essentially building your own NAS appliance.
For enthusiasts, that’s part of the fun.
For someone who simply wants a NAS that works with minimal configuration, a Synology- or QNAP-style appliance may be easier.
Plex and Media Serving
The WTR Pro is also well suited to media-server applications.
The Ryzen model has enough CPU performance for demanding server workloads, while the Intel configuration’s lower power consumption can be attractive for an always-on media server.
The combination of multiple SATA bays and NVMe storage gives you plenty of room for a large media library.
The exact transcoding experience depends heavily on the processor version, operating system, codecs, and whether you’re relying on hardware acceleration.
For serious Plex transcoding requirements, it’s important to check the exact CPU configuration rather than assuming every WTR Pro variant behaves identically.
Virtualization
Virtualization is where the Ryzen version really starts to distinguish itself.
With eight cores, 16 threads, and up to 64GB of RAM, the WTR Pro can serve as a capable small virtualization server. Notebookcheck specifically found the Ryzen configuration suitable for more demanding applications, including multiple virtual machines.
You could potentially use it for:
- Proxmox
- Home Assistant
- Linux VMs
- Windows VMs
- Docker
- Kubernetes experimentation
- Development environments
- Network services
For a home lab, that makes the WTR Pro extremely versatile.
It’s essentially a small server with desktop-PC connectivity.
Cooling and Temperatures
A four-drive NAS has an important thermal challenge: the system needs to cool both the processor and several mechanical hard drives.
AOOSTAR has published temperature testing showing CPU temperatures around 49–50°C under a demanding combination of CPU and four-drive workloads at room temperatures around 26–28°C, depending on fan speed.
Independent testing also found the WTR Pro’s thermal behavior and energy efficiency generally respectable.
That’s encouraging.
However, fan speed and noise naturally increase as the system is loaded.
And remember that four mechanical hard drives will inherently create more noise than an SSD-only NAS.
For a home office or bedroom, drive selection and fan configuration can therefore make a substantial difference.
Power Consumption
Power efficiency is another interesting aspect.
One independent test measured approximately 7.5W at idle without additional NVMe drives or HDDs and around 29W with three NVMe drives and four HDDs at idle, rising to roughly 50–60W during disk activity.
Those figures make the WTR Pro reasonably attractive as an always-on home server.
Naturally, your actual electricity consumption will depend heavily on the number and type of drives installed.
Four large mechanical hard drives can consume considerably more power than SSDs.
Still, for the amount of hardware packed into the chassis, its efficiency is impressive.
Noise
The WTR Pro isn’t completely silent.
There are system fans, and mechanical hard drives generate their own noise.
With four HDDs installed, you will inevitably hear drive activity.
The good news is that community users have reported the WTR Pro being relatively quiet even with four drives installed. One owner specifically described the fans as quiet enough for bedroom use.
Your experience will depend heavily on the drives you choose.
High-capacity enterprise HDDs can be considerably louder than low-power NAS drives or SSDs.
Storage Expansion
This is probably the WTR Pro’s greatest practical strength.
A normal mini PC might give you one or two M.2 slots and perhaps a 2.5-inch drive bay.
The WTR Pro gives you:
4 × SATA bays + 2 × M.2 NVMe slots, with the Ryzen model also providing an additional M.2-capable expansion option in certain configurations.
That gives you an enormous amount of flexibility for such a compact machine.
It can start as a simple mini PC and gradually evolve into a serious home server.
Everyday Desktop Use
If you install Windows, the WTR Pro works perfectly well as a desktop PC.
The Ryzen 7 5825U has enough performance for office work, browsing, programming, media consumption, and light content creation.
The integrated Radeon graphics aren’t designed for modern high-end gaming, but they can handle casual gaming and older titles reasonably well.
The bigger point is that you can connect a monitor, keyboard, mouse, and external peripherals just as you would with any conventional PC.
That makes the WTR Pro unusually flexible.
You can use it as a desktop during the day and as a server at night.
Gaming
Gaming is not the WTR Pro’s main purpose.
The integrated graphics can handle lighter games, esports titles, and older games, but this isn’t a machine for demanding modern AAA gaming at high settings.
The Ryzen version is considerably more capable than the low-power Intel models, but anyone primarily interested in gaming would be better served by a dedicated mini PC with a substantially stronger integrated GPU or a discrete GPU.
The WTR Pro’s strength is versatility, not gaming performance.
Build Your Own NAS
The WTR Pro is particularly appealing to people who enjoy building their own systems.
You choose:
- RAM
- NVMe drives
- HDDs
- Operating system
- RAID/storage configuration
- Containers
- Virtual machines
- Network configuration
That can result in a much more capable system than a similarly priced consumer NAS.
The trade-off is complexity.
You need to understand drive redundancy, backups, networking, operating-system updates, permissions, and storage management.
The WTR Pro gives you the hardware platform; you have to build the solution around it.
Reliability and Support
This is where I would exercise more caution.
The WTR Pro has received positive feedback from many users, and independent testing has demonstrated that the hardware can perform well as both a NAS and mini PC.
However, recent community reports have also raised concerns about reliability and customer support.
For example, some 2026 owners have reported SATA connection instability, spontaneous restarts, or difficulty obtaining responses from AOOSTAR support.
These reports don’t mean every WTR Pro will fail, but they are important when considering the machine for critical data.
A NAS should never be considered a backup simply because it uses RAID.
If you’re storing important photographs, business files, or other irreplaceable data, maintain an independent backup regardless of the NAS hardware you choose.
Who Should Buy It?
The WTR Pro makes the most sense for:
- Home-lab enthusiasts
- NAS builders
- Plex/Jellyfin users
- Proxmox users
- Unraid users
- TrueNAS users
- Developers
- Small offices
- Self-hosting enthusiasts
- Users who want lots of storage in a compact enclosure
It’s less suitable for people who want:
- Plug-and-play NAS software
- Enterprise-level support
- Completely silent operation
- High-end gaming
- Guaranteed 24/7 mission-critical reliability
Pros
- Excellent four-bay NAS/mini-PC hybrid design
- Four 2.5/3.5-inch SATA bays
- Two NVMe slots on Ryzen model
- Powerful Ryzen 7 5825U option
- Up to 64GB DDR4 RAM on Ryzen version
- Dual 2.5GbE networking
- HDMI 2.1 and DisplayPort 1.4
- Flexible OS support
- Suitable for TrueNAS, Unraid, Proxmox, Linux, and Windows
- Good virtualization potential
- Useful for Plex and home servers
- Reasonable power consumption
- Compact compared with traditional NAS/server hardware
- Good cooling performance
- Excellent expandability
Cons
- Much heavier than a typical mini PC
- Four HDDs add noise and power consumption
- Not a high-end gaming machine
- Software setup requires technical knowledge
- Specifications vary considerably between CPU versions
- Ryzen 7 5825U is an older processor
- Customer-support experiences are mixed
- Recent users have reported hardware stability issues
- RAID/NAS configuration does not replace proper backups
- More complicated than a conventional consumer NAS
Final Verdict
The AOOSTAR WTR Pro is one of the more interesting mini-PC designs for enthusiasts because it refuses to choose between being a computer and a NAS.
Its four SATA bays, NVMe expansion, dual 2.5GbE ports, upgradeable RAM, and desktop-class connectivity make it far more versatile than the average mini PC. The Ryzen 7 5825U version in particular has enough processing power for virtualization, media serving, containers, and everyday computing.
The ability to install your own operating system is another major advantage. You can build an Unraid, TrueNAS, Proxmox, Linux, or Windows system around the hardware rather than being locked into a proprietary NAS environment.
The biggest concern is support and long-term reliability. While many owners report successful deployments, recent community reports describe SATA instability, unexpected restarts, and frustrating support experiences.
That makes the WTR Pro a better choice for an enthusiast who is comfortable troubleshooting hardware than for someone who needs a completely hands-off business server.
For the right user, however, it’s an impressive piece of hardware.
Rating: 4.3/5
Bottom line: The AOOSTAR WTR Pro is a remarkably flexible NAS/mini-PC hybrid. Its four drive bays, dual 2.5GbE ports, NVMe expansion, upgradeable memory, and Ryzen performance make it an excellent platform for a home lab, media server, or DIY NAS. Just go in knowing that you’re buying enthusiast hardware rather than a polished enterprise appliance—and keep independent backups of anything important.