Melbourne's Digital Archives Are Drowning in Duplicate Images — and the Numbers Tell a Damning Story

Melbourne's public institutions collectively hold tens of millions of digital image files, and a growing body of evidence from the archival and library sector suggests that somewhere between 20 and 40 per cent of those files are duplicates — stored redundantly across servers, backup drives and cloud platforms, costing money and slowing down the workers who need to find the right image fast.

The issue has sharpened into focus this year as the Victorian government pushes through its Digital Asset Management Review, a statewide audit of how public bodies store, tag and retrieve multimedia content. For institutions already squeezed by flat operational budgets, the hidden cost of duplicate image storage is no longer an abstraction.

The timing matters. With the Allan government's broader efficiency agenda running alongside a housing density reform debate that has put planning documents, architectural renders and site photography front and centre of public discourse, the ability of councils and government agencies to retrieve a single authoritative image file — quickly, correctly — has real administrative consequences. A duplicated planning render sitting in three different folders under three slightly different filenames is not just messy. It is a governance problem.

What Melbourne's Institutions Are Actually Dealing With

State Library Victoria, on Swanston Street in the CBD, manages one of the largest publicly accessible image collections in the southern hemisphere. Its digital holdings run to multiple petabytes, and the library has been open about the resource demands of its digitisation programs. Across the city in Fitzroy, Yarra City Council's library network has been working since late 2024 on a records consolidation project that involves rationalising image assets held across its Carlton, Fitzroy and Collingwood branches.

The Victorian Archives Centre in North Melbourne, which handles state government records, has also been undertaking digital asset audits as part of the Public Record Office Victoria's broader Digital Continuity 2025 framework. That program set a target for agencies to demonstrate compliant digital recordkeeping by the end of 2025 — a deadline that passed with uneven results across departments.

Industry data from the digital asset management sector — including figures cited in reports from organisations like the Digital Preservation Coalition — suggest that the average large cultural institution spends the equivalent of 15 to 25 per cent of its digital storage budget managing redundant files. For a mid-sized Victorian government agency running an annual IT storage budget of, say, $800,000, that translates to up to $200,000 potentially tied up in managing files that should not exist in multiple copies.

The Numbers Behind Duplicate Image Replacement

Replacing a duplicate image with a single canonical version sounds straightforward. It is not. Deduplication projects at institutions of meaningful scale typically require a triage phase, a metadata reconciliation phase, and a deletion-with-verification phase. Industry practitioners working in Melbourne's archival sector — including those contracted to organisations along the Docklands technology precinct — estimate a thorough deduplication project for a collection of 500,000 image files takes between six and eighteen months depending on metadata quality.

The cost of inaction compounds. Cloud storage pricing, even at competitive enterprise rates available through Australian data centres, runs at roughly $20 to $25 per terabyte per month for warm storage. An institution holding five terabytes of duplicate image content is spending up to $1,500 a year on files it does not need — before factoring in staff time spent retrieving the wrong version of an image from an untagged folder.

For Melbourne's arts and cultural sector, where image libraries underpin everything from grant applications to exhibition catalogues, the stakes are particularly concrete. The Australian Centre for the Moving Image at Federation Square has invested in digital asset tooling in recent years, and smaller organisations on Flinders Lane and in Collingwood's creative precinct are increasingly looking at open-source deduplication tools as a first step.

The practical advice from archivists who have been through the process is consistent: start with an automated scan to generate a duplicate report before touching anything. Establish a single source-of-truth folder structure first. And budget for human review — algorithms find the duplicates, but a person still has to decide which version of a 2003 photograph of the Melbourne Town Hall is the one worth keeping.