Cloud vs Office Server: Where Should Your Business Data Live?

Zac Tassone

Published 2 January 2026 · Updated 22 October 2026

Many small businesses still have a server humming away in a cupboard, holding shared drives, an accounting database and years of files. When that server gets old, the question comes up: replace it, or move everything to the cloud? There is no single right answer, but there is a right answer for your business, and it depends on how you work, what software you run and how much risk you can live with.

This guide compares the three realistic options for Australian small and medium businesses: fully cloud, on-premises server, and hybrid.

Facing a server replacement? Our managed cloud services team can assess your setup, or start with a free IT Health Check.

Option 1: Fully cloud

Files move to Microsoft 365 (SharePoint and OneDrive) or Google Workspace, email is already in the cloud, and business applications are cloud-based versions (for example Xero instead of desktop accounting software). There is no server in the office.

Best for: businesses with mobile or hybrid staff, standard office files, and software that has a good cloud version.

• Pros: work from anywhere, no hardware to replace, built-in version history, predictable monthly cost, Microsoft or Google handle the physical infrastructure.
• Cons: relies on a good internet connection, very large files (CAD, video) can be slow to sync, and some older industry software will not run in the cloud.

Option 2: On-premises server

A physical server in your office stores files and runs applications. Staff connect on the office network, and remote staff use a VPN.

Best for: businesses with software that must run locally, very large files used all day by staff in the office, or poor internet options at the premises.

• Pros: fast local access to large files, works if the internet drops, full control over the hardware.
• Cons: large upfront cost every five years or so, needs power protection, cooling, patching and monitoring, remote access is clunkier, and it is a single point of failure if backups are not solid.

Option 3: Hybrid

Most files and email move to the cloud, while a small server or cloud-hosted virtual server runs the one or two applications that cannot move yet. Alternatively, a local storage device caches large files for speed while the master copy lives in the cloud.

Best for: businesses mid-transition, or with one stubborn line-of-business application.

Side-by-side comparison

Security: cloud is not automatically safer, or riskier

Microsoft and Google protect their data centres far better than any small business can protect a server cupboard. But most cloud breaches in small businesses come from stolen passwords, sharing links left open, and missing multi-factor authentication, not from the data centre itself. Whichever option you choose, the same basics apply:

• Multi-factor authentication on every account. See our MFA guide.
• Separate backups. Microsoft 365 and Google Workspace are not full backups on their own.
• Least-privilege access, so staff only see the folders they need.
• Patching, whether that is your server or your laptops.
• A plan for when a staff member leaves.

Our guide to using cloud storage safely covers the day-to-day habits that matter.

Data location and privacy

If you hold personal information, you need to know where it is stored. Microsoft 365 and Google Workspace can keep business data in Australian data centres, and most Australian businesses should make sure they do. For a deeper look at data sovereignty and the Privacy Act, read business cloud storage in Australia.

Questions to answer before you decide

1. Which applications do you run, and do they have a cloud version?
2. How large are your typical files, and who uses them?
3. How many staff work outside the office, and how often?
4. How reliable is the internet at your premises, and is there a backup connection?
5. How old is your current server, and what would replacing it cost?
6. What are your obligations for client data (legal, health, financial)?

How a move to the cloud usually works

A typical migration takes a few weeks and is done in stages: audit and clean up existing data, set up the new structure and permissions, run a test group, migrate in the evening or over a weekend, then decommission and securely wipe the old server. Done well, staff arrive on Monday to the same files in a new place, with a short guide on what changed.