Think of the dental practice whose patient records live on the laptop at the front desk. The one anyone could walk out with. Or the family whose holiday photos from 2019 exist only on an external hard drive that now makes a clicking sound when it powers up. Or the home office worker with files scattered across a laptop, an old PC, a USB stick, and three different cloud services, none of which have the current version of the document they actually need.
A NAS. Network Attached Storage. Is a dedicated storage device that connects to your home or office network, giving every computer, phone, and television in the building access to the same files, without USB cables and without sending your data to the internet.
This article explains what a NAS is, how it works mechanically, what people actually use them for, and. Honestly. Whether you need one. If the answer for your situation is no, this article will say so clearly.
Why a hard drive is not enough
Most people store their files in one of three ways: on the computer they use every day, on an external hard drive plugged into that computer, or in cloud storage like iCloud, Google Drive, or Dropbox. Each of these has a real problem.
Files on a computer. When the computer fails. And every computer eventually fails. The files fail with it. A laptop stolen from a car, a water spill on a keyboard, a hard drive that fails silently overnight and leaves the computer unable to start. If the files only existed on that device, they are gone. Most people have not thought seriously about this until it happens to them.
External hard drives. Better than nothing, but only in specific ways. An external drive typically sits next to the computer, which means it gets stolen with the computer, floods with the computer, and travels with the laptop while the files stay on the desk. It also only works when physically plugged in to one specific machine. And it fails just like any other drive. Mechanically, without warning, often after years of apparently normal operation.
Cloud storage. Reliable and accessible from anywhere. But it costs money indefinitely. Every year, forever. The files live on servers in another country that you have no visibility into. Upload and download speeds are limited by your internet connection. A family with 200GB of raw photos pays a meaningful amount for cloud storage every year with no end in sight. Large video files become expensive quickly. And the entire arrangement depends on the pricing decisions of a company you do not control.
A NAS does not make any of these options irrelevant. It adds a fourth option that addresses what the others cannot: local storage that is always on, accessible from any device in the building, and resilient to individual drive failure.
The NAS does not make your files immortal. It makes a specific and very common category of risk. A single hard drive failing. Survivable.
What a NAS actually is
A NAS. Network Attached Storage. Is a small dedicated computer whose only job is to store files and make them available to other devices on the same network. Each word in that description earns its place.
Network attached means it connects to your home or office network through a cable plugged into your router. The router is the box that connects your home or office to the internet and creates the local network that all your devices share. Once the NAS is on that network, every device connected to it. Laptops, phones, smart TVs, desktop computers. Can access the files on it. No USB cable required. No internet required. The file transfer happens entirely within your building.
Storage means the NAS contains one or more hard drives. The same type that go inside desktop computers. The NAS is the enclosure and the controller: the box that holds the drives and the electronics that manage them.
Dedicated means the NAS does not run applications, browse the internet, or do anything other than serve files. It runs all the time. Day and night. Quietly in the background, waiting for requests from other devices on the network. A device that does one job does it more reliably than a device competing with a dozen other tasks.
If your laptop is a car, a NAS is a garage. You leave things in the garage. The garage is always there, whether or not the car is home. Multiple vehicles can use the same garage. The garage does not come with you to work.
A NAS typically looks like a small box. Anywhere from the size of a thick paperback book to a shoebox, depending on how many drives it holds. It has no screen. You manage it through a web browser on any computer or phone connected to your network, in the same way you would access a router's settings page.
The drives inside. What you are actually buying
Many first-time buyers do not realise that a NAS and its hard drives are sold separately. This causes real confusion when people look at NAS prices and cannot work out why the storage capacity is not included.
When you buy a NAS, you are buying the enclosure: the box, the circuit board that controls the drives, and the software that makes everything work. You are not buying storage capacity. Storage capacity comes from the hard drives you install inside it.
Drives go into bays. A two-bay NAS holds two drives. A four-bay NAS holds four. More bays give you the option of more storage, more protection against failure, or both. Which is explained in the next section.
The hard drives used in NAS units are not quite the same as the hard drives inside desktop computers. NAS-rated drives. Made by Seagate under the IronWolf name and Western Digital under the WD Red name. Are designed to run continuously, 24 hours a day, seven days a week, and to handle the vibration that comes from being in an enclosure alongside other spinning drives. Standard desktop drives can be installed in a NAS but are not designed for this workload and are more likely to fail prematurely under it.
In Australia, a two-bay NAS enclosure from a reputable brand typically costs between $300 and $600. Drives add to that. Usually $80 to $180 per drive depending on capacity. A complete setup with two 4TB NAS-rated drives might cost $500 to $900 all up. This is a one-time cost, not an ongoing subscription.
RAID. What it is and why it matters
When you install multiple drives in a NAS, you have a choice about how those drives work together. Understanding this choice is the most important thing a first-time NAS buyer can do.
The simplest arrangement is to use the drives separately: drive one holds these files, drive two holds those files. This gives you maximum raw storage but no protection. If either drive fails, everything on that drive is gone.
The more common arrangement is to have the NAS treat two drives as a single unit that continuously mirrors the same data across both. If one drive fails, the other still contains every file. You remove the failed drive, insert a replacement, and the NAS rebuilds the copy automatically. Nothing is lost.
This is the core idea behind RAID. Redundant Array of Independent Disks. The full name is less useful than the concept: multiple drives working together so that the failure of any one of them does not cost you data.
There are different RAID configurations, each with a number. RAID 1 mirrors data across two drives. RAID 5 spreads data across three or more drives in a way that can survive one drive failing. RAID 6 can survive two simultaneous failures. Synology's NAS units use their own variant called SHR. Synology Hybrid RAID. Which adapts sensibly to mixed drive sizes. A first-time buyer does not need to understand all of these at the start. What matters is the tradeoff: some configurations prioritise maximum usable storage, some prioritise protection against failure, and some do both but require more drives. The buying guides on this site explain which configuration suits which situation.
For a first-time setup with two drives, the default configuration on most NAS units will mirror your data across both. That is almost always the right starting point.
RAID is not a backup. This is widely misunderstood and worth saying directly. RAID protects against a hard drive failing inside the NAS. It does not protect against the NAS being stolen, the building flooding, a virus encrypting your files, or accidentally deleting something you needed. A complete data strategy requires RAID on the NAS and a separate backup stored somewhere else. A different physical location, a cloud service, or both. The 3-2-1 backup guide covers how to build that strategy.
What you can actually do with a NAS
File storage and sharing. Every device on your network can read and write files to the NAS, exactly like a shared folder. Except the NAS is always available without plugging anything in. In a family home, photos, documents, and videos from every phone and computer can live in one place. In a small office, every person can access the same files from any computer without emailing things to themselves or maintaining duplicate copies.
Automatic backup. A NAS can be configured to automatically back up photos from every phone on the network and files from every laptop. Without anyone doing anything after the initial setup. The backup runs in the background on a schedule. This is the feature that pays for the device on the first day it prevents a loss.
Private photo library. For anyone with a large photo collection, a NAS can run software that organises, searches, and displays photos in a way similar to Google Photos or iCloud Photos. But stored on your own hardware, with no subscription and no copies of your private photos on another company's servers. Synology's built-in photo application and Immich, an open-source photo manager, are the two most commonly used options for this.
Media streaming. A NAS can stream video, music, and photos to a smart TV, streaming stick, or any device in the house. Applications like Plex and Jellyfin. Media server programs that organise your local files into a Netflix-style interface. Run directly on the NAS and serve content to any screen in the building, drawing on files you already own rather than content you are renting.
Security camera storage. Home and office security cameras can record continuously to a NAS rather than to a cloud subscription or a small SD card. For households with multiple cameras, the cost of cloud recording adds up quickly. Local recording to a NAS is a one-time setup with no ongoing cost.
Remote access. Most NAS units can be configured to allow access from outside the home or office. Reaching your files from a laptop at a hotel, or sharing a document link with a client. Australian users on NBN connections need to understand that remote access has specific complications related to how NBN services handle incoming connections. The NAS remote access guide covers these in detail.
Small business file sharing. A NAS can serve a small team as shared file storage, a local backup for critical business records, a destination for security camera footage, and a storage layer for business applications. Without requiring a server room or dedicated IT expertise to maintain.
The brands. And why this is not a generic purchase
The four leading NAS brands in Australia are Synology, QNAP, Ugreen, and Asustor. Each makes both the hardware enclosure and the software operating system that runs on it.
That combination is the key point. When you buy a NAS, you are choosing a software ecosystem as much as a hardware device. The enclosure without its software is just a box with drives in it. The software is what provides the photo library, the media server, the automatic backup, the remote access, and the browser-based interface you use to manage all of it. It also determines how many years of security updates you receive and how polished the day-to-day experience is.
Synology has the most mature and polished software for home and small business users, and the longest track record of consistent support. QNAP offers more technical flexibility and hardware options for users who want greater control. Ugreen is a newer entrant with strong hardware at a competitive price point; its software is capable but less established. Asustor sits between Synology and QNAP in most respects.
None of these choices is wrong. But they are meaningfully different, and the choice matters more here than it would for most hardware purchases. The buying guides on this site compare each brand by use case and budget.
Who a NAS is not right for
A NAS is not the right answer for every situation. Being clear about this is more useful than overselling.
You probably do not need a NAS if you have less than 500GB of data you would genuinely be upset to lose and you are comfortable paying for cloud storage indefinitely. At that volume, the upfront cost of a NAS and drives takes years to recover compared to a modest cloud storage plan.
You probably do not need a NAS if you find technical setup processes frustrating. Modern NAS units are considerably easier to configure than they were five years ago, but first-time setup still requires following instructions carefully and making decisions that have real consequences. If that sounds unpleasant rather than manageable, a managed cloud service may suit you better.
You probably do not need a NAS if the only thing you need is an automatic backup of a single laptop. An external hard drive combined with Time Machine on a Mac or Windows Backup on a PC is simpler, cheaper, and entirely adequate for that specific need.
You probably do not need a NAS if most of your file access happens from outside your home or office. A NAS is primarily a local storage device. Remote access is possible but adds setup complexity, and Australian NBN upload speeds can make it slow in practice. If the majority of your file access is remote, cloud storage is more practical for your situation.
The honest questions to ask yourself
Before deciding whether a NAS is worth pursuing, work through these questions honestly.
How much data do you have that you would genuinely be upset to lose. Photos, business records, creative work, documents that cannot be recreated? If the answer is most of your personal and work files, that is meaningful.
Do you have more than one computer, phone, or device that needs access to shared files? A NAS earns its cost faster when it serves multiple people or devices.
Are you currently paying for cloud storage, and would you prefer to pay once for local storage rather than indefinitely for a subscription?
Do you have a large media collection. Photos, videos, music. That you want to access from a television or multiple devices around the house?
Are you running a small business where file sharing, data backup, and reliable access to records are genuine operational concerns?
If you answered yes to two or more of those questions, a NAS is worth evaluating seriously. If none of them apply to your situation, you probably do not need one.
What a NAS cannot do
A NAS is not a cloud service. It does not have a data centre with redundant power, multiple internet connections, and 24-hour monitoring. If the NAS is in a home that floods or burns, the NAS is gone with everything on it. The data on a NAS still needs to be backed up somewhere else. To an offsite drive, to cloud storage, or both.
A NAS is not maintenance-free. Hard drives wear out. Typically within three to seven years of continuous operation. And need replacing when they start showing signs of failure. The NAS software requires periodic security updates. Occasionally something will need attention: a drive showing warning signs, a rebuild process running after a replacement, a software notification that needs a response. Modern NAS units make this as simple as possible, but it is not zero effort over a five-year lifespan.
A NAS is not instant setup. Initial configuration. Creating the storage pool, setting up user access, enabling automatic backup, getting remote access working. Takes several hours for someone following instructions carefully. The ongoing effort after that is minimal, but the setup investment is real.
And to repeat the point from the RAID section: a NAS is not a backup by itself. RAID protects against a drive failing inside the box. It does not protect against theft, fire, accidental deletion, or ransomware encrypting every file the NAS can reach. A complete data strategy includes the NAS and a separate backup stored somewhere physically different.
Where to go from here
If a NAS sounds right for your situation, the next step is understanding which size and brand matches your use case. The best NAS for Australia guide covers every use case. Home backup, photo library, small business, media streaming. With current Australian pricing across all major brands. If you want a more direct recommendation, the NAS sizing wizard takes a few answers about your data volume, device count, and budget and suggests a specific starting point.
If you are still weighing a NAS against continuing with cloud storage, the NAS vs cloud storage comparison works through the financial and practical trade-offs for your specific situation. How much data you have, what you currently pay, and how you actually use your files.
Related reading: our NAS troubleshooting guide, our replacing external drives with a NAS, and our Home Assistant on NAS guide.
Related reading: our what happens when a laptop dies, our what to do when a hard drive crashes, and our sharing files between home computers.
What is a NAS?
A NAS. Network Attached Storage. Is a small dedicated device that connects to your home or office network and gives every computer, phone, and TV in the building access to the same storage. It runs continuously in the background, requires no USB cables, and does not send your data to the internet. It typically holds one or more hard drives and is managed through a web browser.
What is the difference between a NAS and an external hard drive?
An external hard drive connects via USB to one device at a time and only works when physically plugged in. A NAS connects to your network router and is accessible from every device in the building simultaneously, with no host device needing to be switched on. A NAS also supports RAID redundancy across multiple drives, runs its own software for photo libraries and media streaming, and can perform automatic backups independently.
What is RAID in simple terms?
RAID is a way of having multiple hard drives in a NAS work together so that if one drive fails, none of your data is lost. In the most common configuration, the NAS continuously mirrors every file across two drives. If one drive dies, the other still has everything. You replace the failed drive and the NAS rebuilds the copy automatically.
Is RAID a backup?
No. RAID protects against a hard drive failing inside the NAS. It does not protect against the NAS being stolen, the building flooding, accidental file deletion, or ransomware encrypting your files. A complete data strategy requires RAID on the NAS and a separate backup stored somewhere physically different. An offsite drive, a cloud service, or both.
Do I need a NAS or is cloud storage enough?
Cloud storage is enough if you have less than 500GB of data you care about and are comfortable paying a subscription indefinitely. A NAS becomes the better option when you have a large volume of data, multiple devices that need shared access, or a preference for paying once rather than forever. For most Australian households with photos, videos, and work files across multiple devices, a NAS pays for itself within two to three years compared to cloud storage costs.
What can you use a NAS for?
The most common uses are: automatic backup of every phone and computer in the building, shared file access for a family or small team, a private photo library similar to Google Photos but stored locally, media streaming to televisions and devices via software like Plex or Jellyfin, security camera recording, and remote access to files from outside the home or office.
What brands make NAS units?
The four leading NAS brands in Australia are Synology, QNAP, Ugreen, and Asustor. Each makes both the hardware enclosure and the software that runs on it. Synology has the most polished software for home and small business users. QNAP offers more technical flexibility. Ugreen is a newer entrant with competitive hardware pricing. Asustor sits between Synology and QNAP in most respects.
How much does a NAS cost in Australia?
A two-bay NAS enclosure from a reputable brand in Australia typically costs between $300 and $600. Hard drives are sold separately. Usually $80 to $180 per drive depending on capacity. A complete setup with two 4TB NAS-rated drives might cost $500 to $900 all up. This is a one-time purchase with no ongoing subscription fees.
What is network-attached storage?
Network-attached storage is a storage device that connects directly to a local network. Via a cable plugged into a router. Rather than to a specific computer. Any device on the same network can access the files it contains, simultaneously and without a host computer needing to be on. The term is almost always abbreviated to NAS.
Is a NAS easy to set up?
Modern NAS units are significantly easier to configure than they were five years ago. Initial setup. Creating the storage pool, configuring user access, and enabling automatic backup. Typically takes a few hours for someone following the manufacturer's instructions. Ongoing maintenance after the initial setup is minimal. It is not plug-and-play in the way a USB drive is, but it does not require IT expertise.
Ready to choose a NAS? The buying guide covers every budget and use case with current Australian pricing across Synology, QNAP, Ugreen and Asustor.
See the Best NAS for Australians →