Could SSDs make HDDs obsolete? Not so fast. Despite falling SSD prices, HDDs still dominate bulk storage, and the data says they will for years.
Despite significant technological strides in solid-state drives (SSDs), higher capacities, faster speeds, and sharply falling prices, hard disk drives (HDDs) remain indispensable in the global storage ecosystem, says experts.
Market projections and technical roadmaps by Objective Analysis and Coughlin Associates suggest that HDDs will continue to dominate bulk storage well into the next decade, driven by cost-effectiveness, scalability, and continual innovation.
Analysts recently shared updated cost-per-terabyte ($/TB) forecasts for both SSDs and HDDs extending through 2030. As per the data, SSD prices are expected to decline from approximately $125/TB in 2020 to about $20/TB by 2030, a drop of over 80%.
HDDs, which started at roughly $19/TB in 2020, are projected to reach just $4.75/TB by 2030; a 75% reduction. However, despite the sharper slope in SSD price decline, the two curves do not intersect, meaning no price crossover is expected within this timeframe.
The economic significance of this difference becomes clearer with the projected global storage shipments by media type in exabytes (EB). By 2030, total global data storage demand is forecast to hit 12,000 EB, equivalent to 12 billion TB. If we apply the projected HDD price of $4.75/TB, the HDD market alone could be worth $57 billion.
SSDs are expected to grow in volume and performance, especially for consumer devices, high-speed applications, and enterprise workloads. However, HDDs are better suited for:
- Cold and archival storage
- Backups and disaster recovery systems
- Data lakes and AI model training repositories
- Budget-sensitive mass storage in hyperscale data centres
Importantly, HDDs offer greater long-term stability for infrequently accessed data, and play a vital role in hybrid storage architectures that combine SSD speed with HDD affordability.
Another roadmap by Western Digital provides additional clarity. It charts historical and projected $/TB trends for various SSD and HDD technologies using a logarithmic scale. From 2008 to 2028, SSDs based on SLC, MLC, TLC + 3D, and QLC NAND have achieved steep cost reductions, up to -63% annually in early phases, but have slowed due to supply constraints.
In contrast, HDDs have progressed from perpendicular magnetic recording (PMR) to helium-based designs, and now to microwave-assisted magnetic recording (MAMR). Between 2020 and 2028, MAMR is expected to reduce HDD cost per TB by 15% annually, helping to maintain a price advantage of more than 10 times that of SSDs.
Future developments, such as heat-assisted magnetic recording (HAMR), are expected to push HDD capacities even further, with 150TB drives projected within a decade.
While SSDs are ideal for performance-driven applications, HDDs remain the only viable solution for affordable, large-scale storage. Analysts hope that it will not only survive, but thrive, alongside SSDs, well beyond 2030.
