NAS operating systems in flux – from file server to home cloud
A NAS used to be a simple file server. Today, it’s about self-hosting and independence from the big cloud providers. This introductory article traces how we got here. Future instalments in the series will cover the systems shaping this shift.
Network Attached Storage (NAS) has changed fundamentally in recent years. Alongside established systems like Synology DSM and QNAP QTS, new platforms are emerging that take a different approach. The focus is shifting away from folders and network shares towards services, apps and web access.
This article is the first in an ongoing series on new NAS operating systems. I’m not just interested in what these systems promise. I want to know who they actually make sense for in practice. To understand why they exist, it’s worth taking a look back.
NAS as a pure file server (2000–2008)
In the early 2000s, a NAS served essentially one purpose: making data centrally available on a network. Storage capacity, multi-user access and data security were the priorities. Protocols like SMB and NFS let you access files on the network as if they were stored locally. This is precisely what Network Attached Storage was designed for.
NetApp and IBM describe NAS as a networked storage solution. Unlike SAN systems, the focus isn’t on block-based storage for servers but on straightforward file access. Devices of this era were functional and purpose-built. Manufacturers like Buffalo (TeraStation), Netgear (ReadyNAS), Thecus, LaCie and Iomega relied on proprietary hardware and simple web interfaces. A NAS was made to deliver files reliably. It wasn’t intended as a versatile platform. User-friendliness was bardly a consideration.
The breakthrough – NAS becomes easier to use (2009–2014)
In around 2009, things started changing. With Synology and later QNAP, NAS evolved from a pure storage device into a system where hardware, software and interface work together. Usability moved centre stage and opened the market up to a broader audience.
The operating system became the deciding factor. Synology was an early mover with its DiskStation Manager, building a graphical user interface (GUI) that managed applications centrally. Updates followed clear release cycles. Storage remained the core function, but access became easier. With that, even people without in-depth knowledge of servers could run a NAS.
NAS as a multifunctional platform (2010–2020)
While Synology and QNAP were making NAS more user-friendly, the wider picture was shifting. Streaming was now part of everyday life, smartphones had displaced the PC as the primary device and cloud services had set a new benchmark for convenience. The NAS came under pressure.
Cloud services like Dropbox, Google Drive and Microsoft OneDrive (formerly SkyDrive) arrived on the scene. Synchronisation became the buzzword of the moment, with files suddenly accessible across devices. Convenience was the new benchmark.
NAS manufacturers responded by expanding their feature sets, adding media servers, photo management, synchronisation and collaboration tools. Later came virtualisation features, which allowed applications to run directly on the NAS. QNAP described this evolution as a shift from a classic NAS to an all-in-one server.
But as the feature set grew, so did the complexity. Applications and features were baked into the operating system, making updates increasingly labour-intensive. A NAS was now expected to be both a stable data store and a flexible service platform – a challenge that had previously been the preserve of conventional servers.
Docker and the rise of self-hosting (from 2015)
In 2015, Docker brought about a major shift: containerised applications became the standard. They offered isolation, reproducibility and straightforward deployment. Red Hat also identified containers as a strategic technology early on.
This fundamentally changed self-hosting: services could now be run locally without configuring each one from scratch. At the same time, demand grew for independence from the big tech companies. Privacy, cost and control over your own data mattered more and more.
Classic NAS manufacturers started integrating Docker – Synology, for instance, with what’s now known as Container Manager. But containers remained a tool for advanced users. Although they were available, they didn’t shape the system’s fundamental structure or logic.
New systems focused on self-hosting (from 2020)
In 2020, this changed. Containerisation moved to the centre of system architecture. Platforms like Umbrel, Cosmos Cloud, ZimaOS and Olares no longer think in terms of the file system but in terms of services. You get started via an app catalogue, with applications running on Docker. Storage is a prerequisite, but it’s no longer the centrepiece. Umbrel describes itself as a simple home server OS with an app store and a focus on local control.
These systems aren’t direct successors to Synology or QNAP. They’re the answer to a different question: how do you run your digital infrastructure locally, under your own control, without giving up the convenience of a cloud? Self-hosting flips the model: data remains local, you keep control. The goal is to make self-hosted services as easy to use as smartphone apps.
HexOS as a middle ground (from 2023)
HexOS sits squarely in this space. Available since 2023, it’s built on TrueNAS SCALE – an established open-source system aimed at advanced users. At its core are disks, pools and volumes – precisely the areas that make TrueNAS powerful, but also demanding.
HexOS replaces the TrueNAS dashboard with its own interface – the Command Deck – reducing the complexity without sacrificing the strengths of TrueNAS and ZFS. In doing so, it bridges the gap between a DIY NAS and a ready-made solution like Synology. If you’re familiar with TrueNAS, you don’t need HexOS. But if you want a powerful NAS without deep ZFS knowledge, this is a good place to start. It’s no paradigm shift – just a middle ground that fills a real gap.
What’s coming in this series
The evolution from file server to home cloud is the result of more than 20 years of technical and cultural change. Classic NAS operating systems remain relevant, but a new category is making its case with self-hosting, independence and ease of use.
In the articles to come, I’ll introduce these systems, compare them and explain which one’s best – not in absolute terms, but for your specific use case.
I'm a journalist with over 20 years of experience in various positions, mostly in online journalism. The tool I rely on for my work? A laptop – preferably connected to the Internet. In fact, I also enjoy taking apart laptops and PCs, repairing and refitting them. Why? Because it's fun!
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