Zettlab D6 AI NAS Prototype Review – A Glimpse at the Future of Local AI NAS?

The Zettlab D6 represents a compelling entry into the increasingly competitive world of AI-integrated network-attached storage. Developed by a relatively new player in the market, Zettlab is attempting to blend traditional NAS functionality with localized artificial intelligence features, positioning its devices as intelligent storage hubs capable of far more than simple file serving or backups. It’s important to emphasize from the outset that the Zettlab D6 — and its siblings in the D4, D6 Ultra, and D8 Ultra series — are still under development, with the company preparing to launch these systems via crowdfunding rather than established retail channels. This distinction is not trivial: what we’re looking at here is a prototype, an early production model meant to demonstrate core functionality, not a finalized consumer-ready product. As such, this review assesses both the current capabilities and the projected potential, while keeping in mind the expected evolutions that may come post-launch.

This review is based on a pre-release prototype of the Zettlab D6, supplied ahead of the official crowdfunding campaign. While the unit demonstrated strong hardware build quality and successfully showcased many of the local AI features promoted by the brand, it’s important to note that this version may not fully reflect the final product that backers will receive. As development continues, both software and functionality are expected to evolve. A follow-up video will be produced closer to the end of the crowdfunding campaign to reassess the system, evaluate any updates, and determine how closely the final release aligns with early expectations.

BUILD QUALITY - 8/10

HARDWARE - 8/10

PERFORMANCE - 6/10

PRICE - 9/10

VALUE - 9/10

8.0

PROS

Real local AI processing (image recognition, OCR, transcription, semantic search) works without internet access on the D6.
Intuitive natural language commands for system control (e.g., adjust fan speed, create users, reboot) via built-in AI chat. But still very early days...
Excellent LCD display provides real-time system stats (CPU, RAM, IP, disk status) — rare at this price point.
Fast and responsive UI with good UX; even advanced features like RAID setup and AI search feel snappy and polished, if a little feature lite at this development stage
One-click SD card backup with programmable automation tasks (copy, transcode, eject) — ideal for photographers and creators.
Unique design and solid build quality
Fully populated app center, thanks to the community, ready packaged container deployment at 1 click
Clear product segmentation between D6 and Ultra models (better AI support, faster connectivity, PCIe expansion), allowing users to scale as needed - but could be clearer about the need for an included 1-click local AI client model on the client app requirements.

CONS

Not final software — many features are still in beta or marked “coming soon,” including VM hosting and first-party AI enhancements.
Partial dependency on desktop client for advanced AI functions (like document chat and LLM integration) on the D6 model.
Crowdfunding risks — as a pre-release, crowdfunded device, the final user experience may differ from the reviewed prototype.

Zettlab D6 AI NAS – Hardware Design

Positioned as a mid-tier offering in the range, the D6 occupies a unique spot in Zettlab’s portfolio. It’s more powerful than the compact 4-bay D4, but stops short of the considerable hardware resources found in the D6 Ultra and D8 Ultra. At the heart of the D6 lies the Rockchip RK3588, an ARM-based SoC (System on Chip) that features eight processing cores and an integrated NPU (Neural Processing Unit) capable of six trillion operations per second (6 TOPS).

This chip has become a popular choice for AI-at-the-edge applications due to its low power draw, reasonable performance, and growing developer ecosystem. Complementing the CPU is 16GB of LPDDR4x memory — soldered to the board and non-upgradable — which is ample for many NAS workloads but may bottleneck under high AI load or virtualization. Storage-wise, the system includes six SATA drive bays and a single M.2 NVMe slot for SSD caching or high-speed application hosting. The OS resides on a 32GB eMMC module, which, while functional, is slower and less durable than SSD alternatives found in higher-tier models.

By contrast, the Ultra-class models — the D6 Ultra and D8 Ultra — are built around x86 architecture, using Intel’s Core Ultra 5 125H processor. This CPU offers a dramatic leap in compute potential, with 14 cores (combining performance and efficiency cores), 18 threads, and an integrated AI engine capable of 34 TOPS. These devices support up to 96GB of DDR5 memory via SODIMM slots and include dual PCIe Gen 4 M.2 NVMe slots for storage or app caching. So, an important thing that potential buyers of the standard D4 and D4 model need to note is that this system arrives with ‘on board’ memory, not ‘SODIMM’. This is not uncommon on more ‘efficient’ CPU-powered systems, but AI processes can get really memory hungry and that fixed 16GB, although good to have ‘out the gate’ could potentially serve as a low glass ceiling for heavier ops later on.

They also ship with a 256GB SSD for the operating system, eliminating the limitations of eMMC entirely. The D6 Ultra provides six drive bays like its ARM counterpart, while the D8 Ultra expands to eight, catering to users with higher storage demands.

Network interfaces also scale accordingly, with dual 10GbE ports on the Ultra devices, significantly improving throughput for AI workloads or media editing environments. This clear segmentation allows Zettlab to cater to both entry-level users and more demanding professional or prosumer environments.

Although the D6 is not as performance-heavy as the Ultra models, it still delivers a surprisingly mature and distinctive hardware design — especially for a product from a startup brand. Visually, the D6 breaks from the mold of black-box NAS devices with a more industrial design language. The drive trays are notably robust, offering support for both 3.5” and 2.5” drives without the need for tools, and include subtle shock absorption to reduce wear during hot-swaps. Behind the trays, a SATA backplane keeps cabling clean and ensures good airflow, aided by a rear-mounted fan.

The chassis is largely steel and aluminum, with solid build quality across panels and connectors. The front panel features a real-time 3.49-inch LCD display — one of the best I’ve seen in this price range — capable of showing system temperature, CPU and memory utilization, storage status, and network throughput.

This is complemented by an LED lighting strip and a programmable hardware copy button, as well as a comprehensive set of front ports including a USB-C and USB-A port (both USB 3.2 Gen 1), SD3.0 and SD4.0 card readers, and a TF card slot.

Connectivity on the D6’s rear I/O is functional, if modest by today’s standards. It includes one standard Gigabit Ethernet port and one 2.5GbE port — which, while useful for small workgroups or home streaming setups, may limit its viability in higher bandwidth environments.

USB 2.0 ports are also present, mainly for legacy peripherals or UPS/KVM support. There is a single HDMI 2.0 port capable of 4K output at 60Hz, which opens the door for potential direct media playback or GUI access, though its use cases are still undefined in the current firmware.

Notably missing is any PCIe expansion capability — a feature reserved for the Ultra models via their SFF-8654 Gen4 x8 connector. This omission makes sense in the product segmentation strategy, but prospective users who anticipate needing expansion — whether for faster networking, GPU acceleration, or additional storage — will need to look to the higher-tier models.

Still, for what it is, the D6 offers a complete and well-assembled foundation, and the early signs in terms of temperature control, acoustics, and system stability are encouraging.

Zettlab D6 – Software and Services Review

Before we get into exactly what this system can and cannot do, I need to highlight that the D6 prototype I received does not feel like a finished product yet. I have been monitoring this brand and it’s solution for 6 months (even having a different prototype sent to me as fast back as October 2024) and although I have seen ALOT of changes and improvements in the GUI, the software features, storage optimization, performance and consistency – the Zettlab OS does not feel finished yet.

The hardware feels robust and ready to go! But the software still feels like development is ongoing. This makes a lot of sense in the context of crowdfunding a product and I can appreciate that the brand needs real world feedback and development time. However, that does mean that reviewing the software is tough! As I have to balance what the system does TODAY against what the brand says it will be able to do TOMORROW. So keep that in mind as you read this software review.

One of the standout ambitions behind the Zettlab D6 is its integration of localized artificial intelligence. While most consumer NAS systems limit themselves to media management and basic data organization, Zettlab’s vision goes much further: a platform that applies real-time AI processing to images, audio, video, and documents — all without relying on cloud services.

This pitch is especially appealing in a world where data privacy is an increasing concern. In practice, the D6 delivers some truly novel capabilities, although it’s important to remember this software is still in active development. Not all features are complete, and the performance and behavior of certain AI tools are still subject to change.

The D6 runs on ZettOS, a proprietary operating system built around containerized apps, lightweight AI inference engines, and standard NAS functions.

ZettOS resembles a more refined version of a web-based Linux desktop, complete with user management, storage setup, application deployment, network configuration, and protocol support (SMB, FTP, WebDAV, etc.).

While the core system functions well, it’s the AI layer where things begin to differentiate the D6. ZettOS offers native support for facial recognition, object detection, OCR, and natural language search — all running directly on the device.

Image tagging, semantic queries like “men standing near trees,” and auto-transcription of audio and video files are examples of what’s already functional today.

One of the more impressive capabilities is real-time media classification. Photos added to the NAS — whether uploaded manually, copied via SD card, or moved over the network — are immediately scanned and indexed. Users can search for visual content by descriptive terms rather than filenames. For example, searching for “cats,” “dice,” or “flowers” surfaces content accurately, regardless of how files were named.

This indexing happens locally and often within seconds of upload, leveraging the RK3588’s integrated NPU. Similarly, when audio or video files are uploaded to designated folders, the system automatically transcribes them using onboard tools. The Clip application handles this, and within moments, transcripts appear with speaker identification and time-linked navigation.

The AI features are tied to a broader system of prompts and shortcuts. A dedicated “AI Chat” interface allows users to type commands like “increase fan speed,” “reboot the system,” or “create a new user.” Many of these commands work today and are executed promptly, showing promise for a more natural interface between user and NAS.

While it’s far from full AI orchestration, the groundwork is clearly there. The system also supports basic automation — for example, auto-import tasks triggered when an SD card is inserted can move, rename, or transcode files and even safely eject the card afterward. These are practical, time-saving tools that go beyond novelty.

ZettOS includes a growing App Center with one-click deployments of popular open-source tools like Jellyfin, Nextcloud, Image, and Home Assistant. Apps are containerized and installed quickly, with port forwarding handled automatically. While this is becoming common among modern NAS platforms, ZettOS executes it cleanly and without needing user intervention.

Some proprietary applications, such as Creator Studio and virtual machine hosting, are marked “coming soon” in the current builds, with roadmap estimates targeting mid-2025. It’s clear that while ZettOS is already usable, it is also a work in progress.

Notably, the AI document analysis and generative chat features currently require the desktop companion app for full functionality on the D6 model, with a locally downloaded AI model (1 click from the client software install, but still, this could be clearer in the online documentation!).

While the basic indexing and media analysis are handled on-device, more advanced interactions such as querying large document sets or generating context-specific answers appear to rely on the Windows or Mac client.

This distinction is critical: the more powerful Ultra models promise full offline AI, while the standard D6 offloads some computation. Transparency about how much AI is truly local versus partially remote will be key for user trust going forward.

Zettlab D6 Prototype Review – Conclusion and Verdict

Overall, the Zettlab D6 offers one of the most advanced AI software stacks seen in a consumer NAS at this level — even in its unfinished state. With real-time image recognition, semantic search, speech-to-text transcription, natural language controls, and media classification, it exceeds what many larger NAS brands have offered to date. There are still rough edges, missing features, and questions about long-term support, but what’s already functional is impressive. For early adopters and tinkerers, this is a promising glimpse of what local AI NAS could become. For others, it may be worth waiting to see how ZettOS matures over the next development cycle.

Important – This review is based on a pre-release prototype of the Zettlab D6, supplied ahead of the official crowdfunding campaign. While the unit demonstrated strong hardware build quality and successfully showcased many of the local AI features promoted by the brand, it’s important to note that this version may not fully reflect the final product that backers will receive. As development continues, both software and functionality are expected to evolve. A follow-up video will be produced closer to the end of the crowdfunding campaign to reassess the system, evaluate any updates, and determine how closely the final release aligns with early expectations.

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UGREEN NASync NAS: One Year Later – The Good, The Bad, and What’s Still Missing?

One year ago, UGREEN made waves in the NAS industry by launching its NASync series through a hugely successful Kickstarter campaign, raising $6.6 million from over 13,000 backers. This new line of NAS devices aimed to offer a cost-effective alternative to established brands like Synology and QNAP, promising powerful hardware, a user-friendly experience, and AI-powered features at a more competitive price. Since its general retail release in mid-2024, UGREEN NASync has been available via Amazon, B&H, and UGREEN’s website, gaining a strong following among enthusiasts and small businesses. But after a year of real-world usage, firmware updates, and customer feedback, does the NASync series truly compete with industry leaders? Has UGREEN delivered on its promises, or are there still major issues preventing it from being a go-to NAS solution? This article will explore where UGREEN has excelled, where it still needs improvement, and whether the NASync series is a worthwhile investment in 2025.

Note – UGREEN are running a promotion during World Backup Day that drops the price significantly on several of their NASync devices on their own website and on Amazon. Find out more here or via the banner link below:

The UGREEN NASync NAS Kickstarter – A Recap

Unlike many hardware startups that struggle with fulfilling Kickstarter orders, UGREEN managed to deliver its NASync units on schedule to most backers, a significant achievement for a crowdfunded product. While there were some reports of faulty units, these appeared to be within normal failure rates for electronics and were generally covered by UGREEN’s replacement and support policies. What truly set UGREEN apart, however, was its unorthodox marketing strategy. Instead of focusing on traditional advertising or securing major sponsorship deals, UGREEN distributed thousands of review units to mid-tier and micro-influencers.

This grassroots approach ensured that discussions about the NASync series remained active and widespread across online tech communities. Unlike companies that pay for high-profile reviews on massive platforms like Linus Tech Tips, UGREEN instead prioritized authenticity and volume, creating long-term engagement from reviewers who actually tested the product in-depth. This strategy has proven successful, keeping UGREEN’s NAS devices relevant in online discussions long after their launch, though it has also meant that larger, mainstream tech publications have not widely covered the NASync series. While this marketing approach has helped build a loyal user base, it also raises concerns about how well UGREEN’s products will compete with more established brands in the long run if they do not gain broader mainstream recognition.

The UGREEN NAS Software Development So Far…

When the NASync series launched, its UGOS operating system was one of its most significant unknowns. Unlike Synology DSM or QNAP QTS, which have been refined for years, UGOS was a first-generation NAS OS that lacked many critical features and refinements expected by experienced users.

Over the past year, UGREEN has made steady improvements, rolling out regular firmware updates that have expanded its functionality. One of the most notable additions is the inclusion of Jellyfin as a native app, providing an alternative media server option for users who want to stream videos without needing complex third-party installations.

However, Plex support remains absent, a surprising omission considering Plex is the most widely used NAS-based media server. Another major shortcoming is the lack of iSCSI support, which is essential for business users, virtualization environments, and enterprise-level storage solutions.

While UGREEN has stated that iSCSI support is on their roadmap, it has yet to be implemented, making the NASync series a less viable option for professional users who rely on networked block storage solutions. Despite these improvements, UGOS is still not as polished or feature-rich as competing NAS operating systems, and for users who need advanced storage capabilities, its limitations remain a concern.

UGREEN NAS and Security – After 1 Year

Security was one of the biggest concerns when UGREEN first launched its NASync series, as it initially lacked two-factor authentication (2FA) and had limited built-in protections for remote access. Over the past year, UGREEN has addressed some of these concerns, adding 2FA and expanding firewall settings to include IP blocking, MAC filtering, and customizable access controls.

These updates have significantly improved overall security, but the absence of dedicated anti-ransomware protection remains a critical weakness. Competing NAS brands such as Synology and QNAP have introduced automated ransomware protection tools, snapshot-based rollback systems, and real-time anomaly detection, features that UGOS has yet to incorporate.

The NASync series does provide basic malware and antivirus scanning, but it is still lacking the more advanced automated security solutions that have become standard in the NAS industry. Users who are particularly concerned about security may prefer to disable UGREEN’s remote access services and instead use third-party VPN solutions like Tailscale or even install an alternative NAS operating system such as TrueNAS or UnRAID, both of which UGREEN supports without voiding hardware warranties.

UGREEN NAS and Local AI Use

UGREEN has been heavily investing in AI-driven functionality, integrating photo recognition, AI-assisted indexing, and content categorization into UGOS. Unlike cloud-based AI solutions, these run entirely on the NAS itself, keeping user data private and locally processed. This makes UGREEN one of the few NAS brands to offer AI-powered automation without cloud dependencies, a feature that privacy-conscious users appreciate.

However, with the recent announcement of UGREEN’s new IDX series, which focuses even more on AI-powered storage and advanced computing, there is growing uncertainty about the long-term future of the NASync series. It remains unclear whether UGREEN will continue to develop UGOS at the same pace for NASync devices or shift focus toward its newer, AI-driven IDX models.

While UGREEN insists that the NASync and IDX series will coexist as separate product lines, there is a possibility that software development for NASync may slow down in favor of newer hardware platforms. This uncertainty may deter potential buyers who want long-term software support guarantees.

UGREEN NASync Devices and Mixed Global Availability

Despite the NASync series’ popularity, UGREEN has struggled to expand its global distribution network. While the devices are widely available in the US, Germany, and select European markets, many regions still lack direct purchasing options. The UK recently saw improved availability, but other regions remain underserved, forcing potential buyers to import devices at higher costs.

Given the strong demand and continued interest, it is surprising that UGREEN has not prioritized expanding its retail presence globally. If the company wants to compete seriously with major NAS brands, broader availability through additional international retailers should be a key focus moving forward.

UGREEN NAS 1 Year Later – Verdict

One year in, UGREEN’s NASync series has made a strong impression in the NAS market, proving that it is more than just a one-off experiment. The company has demonstrated consistent software development, ongoing support, and a commitment to hiring industry experts to strengthen its NAS business. However, the NASync series still falls short in key areas, particularly iSCSI support, security automation, and mainstream availability. For enthusiasts and tech-savvy users willing to customize their setup, UGREEN’s NASync devices offer solid hardware at an attractive price. But for those who expect a polished, fully mature NAS experience, Synology and QNAP still lead the market. UGREEN has the potential to become a serious competitor in the NAS space, but its future success depends on how aggressively it continues to develop UGOS, improve security, and expand its global footprint.

20% OFF UGREEN NAS this World Backup Day

UGREEN is currently running a Work Backup Day promotion, offering a 20% discount on NASync devices purchased through their official website and Amazon. This limited-time deal runs from March 25th to March 31st, making it an excellent opportunity for those considering a UGREEN NAS for data protection and backup storage. With the growing importance of secure, local backups, especially for businesses and home users managing large datasets, this promotion provides a cost-effective way to invest in a NAS solution. Whether you’re looking to set up automated backups, secure your media collection, or expand your existing storage infrastructure, the discount makes UGREEN’s already competitive pricing even more attractive. However, with global availability still being somewhat inconsistent, buyers should check regional stock levels and shipping options before purchasing.

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Windows 11 is a robust operating system with a host of features, especially optimization features. In this guide, we explore one of them, the DirectX Shader Cache in Windows 11, and show you all the different ways to clear it when needed.

What is DirectX Shader Cache in Windows 11?

On Windows 11, the DirectX Shader is the optimization feature for storing pre-compiled versions of special instructions, which are called shaders.

Shaders are tiny programs that your graphics card understands. These programs direct the graphics card’s handling of various graphical effects.

Compiling these shaders may be time-consuming, so the cache increases optimization because pre-compiled versions are easier and faster to access.

Should I Clear the DirectX Shader Cache?

Your decision to clear the cache will depend on you. However, below are some reasons why you may want to do so.

• To resolve performance issues – A cleared DirectX Shader cache may resolve some performance issues, including graphical glitches and stuttering.
• Freeing up disk space – Even though the cache may not take up much space, clearing it will still free up some extra space on your computer.
• To update the cache – If you have just updated your graphics card or installed new games, you may clear the DirectX Shader cache to fill it with new information.

How do I Clear the DirectX Shader Cache?

1. Using the Settings App

1. Lunch the Settings app by clicking Windows + I.

2. Navigate System, then Storage.

3. Select Temporary files.

4. Select DirectX Shader cache and click the Remove Files option at the top.

2. Clear DirectX Shader Cache Using Disk Cleanup

1. Click the Taskbar’s magnifying lens type cleanup, and click Disk Cleanup.

2. Select your C drive, then click the OK button.

3. Tick the DirectX Shader cache option and click OK.

Do I Have to Replace the DirectX Shader Cache After Deleting It?

No, you do not have to replace it. After this cache is deleted, your operating system will automatically fill it with all the needed information.

You should also note that clearing the cache is not something you must do often. It is mainly a troubleshooting step when you face some graphical issues.

A New DirectX Shader Cache

This is all we share in this guide. If you have followed from the beginning, you already know all there is to know about the cache, and you probably already have a new DirectX Shader cache.

Were you able to clear the DirectX Shader Cache in Windows 11? Ask your questions in the comment section below.

FAQs

The post Clear DirectX Shader Cache in Windows 11: Top Ways appeared first on Next of Windows.