Rare Earth Recycling from Data-Center Hard Drives: Who Controls the Return Route?

Start with the material holder, not the AI forecast

Western Digital has linked growing AI storage demand to hard-drive infrastructure. That says something about drives being deployed now, while retirement and material recovery occur later. Drives can contain neodymium, praseodymium and dysprosium in their magnet assemblies; neither a forecast of installed drives nor the weight of an entire retired drive is a direct measure of magnets ready for purchase. [2] [3]

The useful market question is more precise: who can release the equipment, who separates the material, which facility recovers rare-earth oxides, and what evidence shows that the chain can repeat? The two public routes below answer different parts of that question.

The Microsoft–Western Digital pilot: a chain that processed material

Western Digital reported in April 2025 that a pilot with Microsoft, PedalPoint Recycling and Critical Materials Recycling processed approximately 50,000 pounds of shredded end-of-life hard drives, mounting caddies and other materials collected from several US Microsoft data centers. Rare-earth elements were among the recovered materials. This is evidence of a named, completed processing route, with the 50,000 pounds describing mixed incoming hardware. [4]

The subsequent technical paper maps the handoffs: Microsoft supplied retired drives; PedalPoint sorted shredded equipment into material fractions; the ferrous fraction went to Critical Materials Recycling for rare-earth-oxide recovery. The circuit-board fraction followed a different route, including a smelter in South Korea. The paper states that rare-earth-oxide recovery took place in the United States. This distinction matters when describing where the different outputs were made. [3]

Three numbers from the pilot, three different measurement bases

A buyer can easily see three quantities from the same project and mistake them for interchangeable production data. Their source-defined meanings are different:

The white paper's overview also describes approximately 47,000 pounds of HDDs, SSDs and caddies, while the earlier announcement uses approximately 50,000 pounds and a somewhat different description of the incoming mix. The sources do not reconcile those approximate scopes. Their difference cannot be interpreted as a recovery loss. [4] [3]

ERI–Cyclic: a collection route under qualification

In July 2026, electronics recycler ERI and rare-earth recycler Cyclic Materials announced a strategic partnership. ERI would use its collection and pre-processing network to send magnet-bearing electronics to Cyclic's recovery operations; the parties said they had begun analysing samples to qualify product categories. That describes an intended handoff and qualification work. The announcement does not identify a completed, route-specific hard-drive batch comparable to the Microsoft pilot. [5]

ERI's total electronics-processing scale and Cyclic's facility capacity describe their respective businesses. They cannot stand in for a measured flow of recovered NdFeB magnets through this particular agreement. The partnership could broaden access to feedstock, while evidence of regular transfer volumes and qualified outputs would answer the next commercial question. [5]

A practical evidence ladder for magnet buyers

A return route becomes more useful as evidence appears at each successive step. REE Monitor applies these checks without converting one kind of quantity into another:

1. Control: Identify the owner or collector of the retired hardware and the specific device or scrap stream.
2. Handoff: Name the sorter and recovery processor, and distinguish a completed material transfer from a signed agreement.
3. Conversion: Record what was actually produced, with its material basis and a source for the process or batch.
4. Repeatability: Look for a collection cadence, consistent feedstock specification, product qualification and measured deliveries before treating the route as dependable supply.

The Western Digital–Microsoft case reaches a documented conversion step in a pilot. ERI–Cyclic identifies a prospective network and active qualification. These are useful but different market signals. The International Energy Agency's broader assessment also notes that manufacturing scrap still dominates secondary rare-earth supply; end-of-life routes need time and infrastructure to mature. [6]

For a buyer, the next request is concrete: show the mass of magnet-bearing input and recovered product by period, the specification accepted by the next processor or customer, and the terms under which the material will be collected again. A press release, life-cycle calculation and commercial delivery record answer different questions.

References and source interpretation

The first reference is earlier industry coverage; figures in this note are attributed to the original operator disclosures and technical paper. The grouping into control, handoff, conversion and repeatability is REE Monitor's analytical framework, not a claim of independent on-site verification.

1. Magnetics Magazine, 20 August 2025: Capturing Rare Earth Material from Hard Disk Drives – At Scale by Industry Leaders — earlier industry reporting on the pilot; the original disclosures below are used for quantitative claims.
2. Western Digital, 22 April 2026: sustainability update — AI storage context and pilot reference.
3. Western Digital, June 2025: Advanced Recovery and Rare Earth Capture at Scale (PDF) — study scope, process handoffs and normalised mass balance.
4. Western Digital, 17 April 2025: recovery pilot announcement — partners and approximate mixed-hardware batch.
5. ERI and Cyclic Materials, 21 July 2026: partnership announcement — intended route and sample qualification.
6. IEA, Rare Earth Elements, April 2026 — manufacturing scrap and potential end-of-life sources.