Rhownica Birch, Director, Global Operations Sustainability, Product Circularity at Western Digital, discusses how advanced rate material recovery is empowering a circular future for HDDs.
In a world increasingly focused on sustainability, one pressing question remains: What happens to IT electronics once their lifecycle ends? HDDs are no exception to this.
With the rapid evolution of digital technologies like Artificial Intelligence (AI), Machine Learning (ML) and the Internet of Things (IoT), HDDs are the backbone of storage infrastructure, particularly within hyperscale cloud data centres.
According to IDC, the annual volume of data generated is expected to more than double to 527.5 zettabytes (ZB) in 2029.
By 2028, IDC expects that HDD storage will maintain a share of nearly 80% of the installed base for hyperscale/cloud data centres.
This underlines that HDDs are essential to enabling future technological advancements.
Even though HDDs offer a long product lifespan and allow for fewer replacement cycles, it remains important to understand what happens to them at the end of their life.
How can the materials they contain be recovered and repurposed to empower a circular economy approach?
Exploring this question led to the development of the ‘Advanced Recovery and Rare Earth Material Capture Programme’.
The US initiative driven by Western Digital and three partners was designed to recover rare earth elements from decommissioned and shredded hard drives at scale.
This effort not only addresses the growing demand for rare earth materials, which are critical to modern electronics, but also represents a forward-looking approach to resource sustainability.
By rethinking the afterlife of HDDs, the programme underscores the role that responsible innovation can play in building a more sustainable digital future.
To truly understand the value of recovering materials, it is important to understand the complexity and sophistication of the devices themselves.
HDDs are highly innovative and deeply technical products, combining advances in both material and mechanical sciences.
Each drive is made up of hundreds of components, constructed from a range of materials including aluminium, steel and rare earth elements such as neodymium, dysprosium and praseodymium.
Aluminium and steel serve as the foundational materials, forming the enclosure and supporting the drive’s internal structures, such as the platters, spindle motor, actuator and other key mechanical parts.
Rare earth elements are essential to the magnetic performance of HDDs.
Neodymium magnets, for instance, are what enable an HDD to read and write data.
These elements are vital to the device’s overall efficiency, reliability and long-term durability.
However, when data centres decommission older HDDs, many drives are destroyed for data security purposes.
In the process, rare earth materials are often melted down with steel.
This is due to conventional recovery methods, which rely on corrosive processes that are neither environmentally sustainable nor economically viable, resulting in the loss of these critical elements.
In response, a new approach was developed to improve the recovery of valuable materials from end-of-life HDDs, aiming for greater efficiency and environmental responsibility.
A breakthrough in rare earth material recovery emerged through collaboration with science foundations and innovation hubs.
It was within this ecosystem of innovation that a unique process came to light: The Critical Materials Recycling’s (CMR) acid-free dissolution recovery (ADR) technology.
Developed over eight years ago, ADR offered a cleaner, more efficient alternative to traditional, corrosive recovery methods.
Informed by this advancement, a controlled study was launched to evaluate the effectiveness of ADR in reclaiming rare earth elements from retired hard drives.
The results were promising: Recovery rates exceeded 90%, demonstrating the potential to transform how valuable materials are recaptured at the end of a device’s life.
Building on that success, a large-scale pilot programme was kicked off in 2024, bringing together technology and recovery partners.
Hard drives were collected from data centres across the US and then sent to the recovery partner for sorting and processing.
Shredded components, including HDDs, SSDs and mounting caddies were separated and magnets and steel were delivered for recycling.
Using the ADR process, the methods for sorting, sizing and extracting rare earth materials were redefined in a way that was both environmentally responsible and economically viable.
Over several phases, the partnership invested in new equipment and innovations, scaling up to a full mass-production ecosystem by the end of 2024.
In total, nearly 50,000 pounds of end-of-life devices and materials were converted into high-value, reusable resources, with a dramatically reduced environmental footprint.
This cross-industry initiative has shown that large-scale, sustainable rare earth recovery is not only achievable but also scalable.
Through precision sorting, advanced chemical processing and a shared commitment to circularity, the project achieved approximately 90% recovery of elemental and rare earth materials and an overall capture rate of 80% for all shredded inputs.
Most notably, the process reduced carbon emissions by 95% compared to traditional virgin mining, marking a significant step forward in environmentally responsible electronics recycling.
What makes this initiative especially promising is its potential to extend beyond data storage.
The technology, processes and collaborative ecosystem developed through this programme are not limited to the data centre industry; they can serve a much wider range of applications.
Once recovered, the rare earth elements and other materials are reintegrated into the domestic supply chain, helping to strengthen the markets for critical resources.
This closed-loop approach not only benefits Western Digital’s cloud customers but also holds significant value for sectors such as electric vehicles and renewable energy.
This emerging ecosystem represents a ‘carbon handprint’ model, one that demonstrates a measurable positive impact and sets a precedent that can be replicated across industries.
As the process continues to mature, it is expected to evolve further towards true closed-loop circularity, where recovered materials are continuously reused within supply chains.
This initiative marks a turning point in how end-of-life data storage devices are handled.
More than just a sustainability milestone, it stands as a replicable blueprint for the domestic recovery of essential metals – one that promises lasting environmental and economic benefits.
Technology breakthroughs happen every day, but the most impactful ones are those that shift paradigms.
This programme exemplifies what is possible when innovation, environmental stewardship and cross-sector collaboration come together.
It is a testament to what can be achieved when organisations work in tandem with a shared purpose and a clear vision for a more sustainable future.
This article was originally published in the August edition of Security Journal UK. To read your FREE digital edition, click here.
