How to Share Files Between Computers at Home (Australia)

If you've ever emailed a file to yourself just to open it on another computer, or carried a USB drive between rooms, there's a better way. Most Australian households now have three to five devices. A desktop, a laptop, a phone, maybe a tablet. And moving files between them shouldn't require workarounds. Here's what actually works, what the tradeoffs are, and how to pick the right approach for your home.

Why File Sharing at Home Is More Complicated Than It Should Be

Australian households are increasingly multi-device. Research shows more than 90% of Australian households with internet access have multiple connected devices, yet most people still share files the same way they did in 2010. USB drives, email attachments, or hoping their cloud sync catches up in time.

There's also a distinctly Australian wrinkle: NBN upload speeds. A typical NBN 100 plan offers around 20Mbps upload. That's fine for syncing a document, but upload a 4GB video and you're waiting 30 minutes before it's available on another device via cloud. iCloud and Google One are also priced in USD and converted to AUD at rates that fluctuate. Australians pay a built-in exchange rate premium on storage that US users don't.

Your Four Options. Plain English

Option 1: Cloud Shared Folder (Google Drive, OneDrive, iCloud)

Put a file in your Google Drive or OneDrive folder, and it appears on every other device signed into the same account. This works well for documents and photos, and if you already subscribe to Microsoft 365 or Google One, you probably have more cloud storage than you're using.

Works well when: Files are modest in size (documents, spreadsheets, PDFs), you're comfortable paying ongoing storage costs, and you need access from outside home regularly.

The catch: Storage costs in AUD after free tiers. Uploading large files (videos, raw photos) is slow on NBN upload speeds. You're dependent on internet connectivity. No internet means no files.

Option 2: USB Drive or External Hard Drive

An external drive plugged into one computer and carried to another. Simple, cheap (~AU$80-150 for 2TB), and works without internet.

Works well when: You only occasionally need to transfer files and they're large (video footage, game backups).

The catch: It's manual. There's no automatic sync. You need the physical drive in hand. A single drive is not a backup: if it fails or gets lost, your files are gone.

Option 3: Built-in Windows or Mac File Sharing

Both Windows and macOS have built-in file sharing that lets one computer share a folder over your home network. No monthly cost, no cloud required.

Works well when: All your computers run the same operating system (all Windows or all Mac), the sharing computer is usually on, and you only need access from inside your home.

The catch: Cross-platform sharing (Windows sharing to a Mac, or vice versa) is fiddly to set up and occasionally breaks after system updates. The shared computer must be running. Shut it down and nothing is accessible. Not accessible from outside your home network without extra configuration.

Option 4: A NAS (Network Attached Storage)

A NAS is a small, always-on box that connects to your home router. It holds one or more hard drives and appears as a shared network drive on every computer and phone in your home. Windows, Mac, iPhone, Android, all at once, without any of them needing to be on or logged in.

Unlike cloud storage, your files never leave your home. Unlike built-in file sharing, it doesn't depend on a specific computer being awake. Unlike a USB drive, it's accessible from anywhere via an app. You can pull up a file on your phone while you're at work.

Works well when: You have multiple devices across different operating systems, you want files accessible from anywhere, you store large files (videos, photos, backups), or you're tired of paying monthly cloud fees.

The catch: It's a one-time hardware purchase (~AU$350-700 for the NAS unit, plus ~AU$80-150 per hard drive). There's a modest setup process. What a NAS actually is. And whether it suits your situation. Is explained in detail here.

Which Option Is Right for Your Home?

If you only share documents and you're already paying for Google One or Microsoft 365, you probably already have what you need. Use it. If you're trying to share large files (video, raw photos, game backups) across multiple devices without upload delays, or if you're paying monthly for cloud storage and want to stop, a NAS is worth looking at seriously. The upfront cost typically pays for itself within 2-3 years compared to cloud subscriptions.

A middle ground many households settle on: free-tier cloud for easy sharing with others, and a NAS as primary home storage. That approach gives you the convenience of both without the ongoing cost of large cloud tiers.

For more on comparing cloud vs home storage costs, see NAS vs Cloud Storage Australia. If iCloud costs are the specific frustration, cheaper iCloud alternatives for Australians covers the options in detail.

How to Set Up Windows Built-In File Sharing (Step by Step)

Windows built-in file sharing (SMB) works well for two or three computers on the same network. On the computer that will host the shared folder: right-click the folder you want to share, select Properties, click the Sharing tab, then click Advanced Sharing. Check "Share this folder", click Permissions, and set the access level. Everyone with Read allows any network user to see the files; setting specific users gives you tighter control.

On other Windows computers, open File Explorer, click Network in the left panel, and the host computer should appear. If it does not, type the host computer name directly into the address bar in the format \\COMPUTERNAME\SHARENAME. The main limitation is that the host PC must be switched on for anyone else to access the files. If the host is a laptop that goes to sleep, the share disappears.

How to Map a NAS as a Network Drive on Windows and Mac

Once a NAS is on your network, mapping it as a network drive makes it appear in File Explorer or Finder just like a local drive. On Windows: open File Explorer, right-click "This PC", select "Map network drive", choose a drive letter, and enter the NAS share path in the format \\NAS-IP\ShareName. Tick "Reconnect at sign-in" so the mapping survives restarts.

On macOS: open Finder, press Cmd+K (Connect to Server), and enter the NAS address in the format smb://NAS-IP/ShareName. Click Connect and enter credentials. To make the mount persistent, go to System Settings > General > Login Items and drag the mounted volume into the list. This mounts the NAS share automatically at each login.

Common Mistakes When Sharing Files at Home

The most common home file sharing mistake is relying on one of the four options exclusively without thinking about backup. A shared cloud folder with no local copy means a cancelled subscription deletes access. A shared external drive with no second copy means a dropped drive ends everything. A NAS with no offsite backup survives a drive failure but not a fire or theft.

The second common mistake is using a shared folder on a laptop as the household file server. Laptops suspend WiFi and sleep unpredictably, interrupting transfers mid-stream. Anything acting as a household file server should be either a dedicated NAS or a desktop PC that stays on and connected via Ethernet, not WiFi.

Use our free NAS Sizing Wizard to get a personalised NAS recommendation.

Can I share files between a Windows PC and a Mac at home?

Yes. Cloud services (Google Drive, OneDrive) work seamlessly across both. A NAS also works with both Windows and Mac simultaneously. It appears as a mapped network drive on Windows and a mounted volume in Finder on Mac. Built-in Windows/Mac file sharing can work cross-platform but requires more configuration and is less reliable.

Do I need the internet to share files at home?

No. If you use built-in file sharing or a NAS, files are shared over your home Wi-Fi or network cable. No internet connection required for access within your home. Cloud services (Google Drive, iCloud, OneDrive) do require an internet connection for syncing and access.

Is it safe to share files over my home network?

Yes, sharing files over your home Wi-Fi is no less secure than the devices themselves. Your home router's Wi-Fi password protects the network. A NAS adds user account controls. You can restrict which folders each person can access. The main risk is making sure your NAS isn't inadvertently exposed to the public internet. Most consumer NAS units have this turned off by default.

How much does a home NAS cost in Australia?

Entry-level 2-bay NAS units from Synology or QNAP start around AU$350-450. You'll also need hard drives. 2TB NAS drives cost roughly AU$80-110 each. A basic 2-bay setup with 2×2TB drives runs around AU$550-650 all up. That compares to roughly AU$107/year for iCloud 2TB. So it typically pays for itself within 5-6 years, with no ongoing fee after that.

Can I access files on a NAS from outside my home?

Yes. Most consumer NAS units include a mobile app (Synology's DS file, QNAP's Qfile) that lets you access your files from anywhere with an internet connection. Similar to how you'd use a cloud storage app. Remote access depends on your home NBN upload speed. For browsing documents and photos it's fine on most connections; streaming large video files remotely works better on NBN 250 or faster plans.

What is the fastest way to share large files between two computers on the same home network?

Direct LAN transfer is the fastest method. Both computers connected to the same router via Ethernet can transfer at gigabit speeds (around 100-120 MB/s in practice). WiFi (even WiFi 6) is slower and less reliable for large transfers. A NAS on Ethernet acts as the intermediary: you copy to it at gigabit from one PC and copy from it at gigabit to another, usually faster than copying between two WiFi-connected laptops.

Does file sharing work between Windows and Mac computers on the same network?

Yes. Windows uses SMB (Server Message Block) as its file sharing protocol, and macOS supports SMB natively. On a mixed Windows/Mac home network, enable sharing on the Windows PC via the method above, and macOS connects using Cmd+K > smb://COMPUTERNAME. A NAS avoids this issue entirely since it speaks SMB natively to both platforms simultaneously.

Can I access my home shared files from outside the house?

Built-in Windows and Mac sharing only works inside your home network. Cloud folders (Google Drive, OneDrive) work from anywhere. A NAS with remote access configured (Synology QuickConnect, Tailscale, or UGOS Connect) gives you outside access to your local files without a subscription. For Australian users behind NBN CGNAT, Tailscale is the most reliable remote access option.