Toshiba plans to double its hard disk drive production capacity by its 2027 financial year, investing roughly ¥60 billion, about $380 million, in an expansion of its plant in the Philippines. Nikkei reported the plan on 1 October, describing it as the company's first major hard drive investment in around five years.
The ambition behind it is larger than the spending suggests. Toshiba wants to take its share of the market, measured by storage capacity shipped, from just over 10% to 30% over the medium term, which would make it a far more serious rival to Seagate and Western Digital, the two companies that dominate the business.
New production lines are expected to raise capacity per drive by up to 40%, with 65-terabyte-class drives planned by 2030 and 100-terabyte products after that.
Why AI Is Buying Hard Drives
The expansion runs against a long-held assumption that flash storage would eventually push hard drives aside. AI data centres have revived them, because training and running large models produces enormous volumes of data that must be kept but is rarely read: training sets, model checkpoints, logs, and the archives behind retrieval systems.
For that kind of storage, cost per gigabyte decides the purchase, and hard drives remain far cheaper than solid-state drives at scale. The result is a market where the older technology is the constrained one.
Western Digital said in February that its entire 2026 production was sold out, with supply agreements running into 2028, and that hyperscale customers accounted for 89% of its revenue while consumer storage fell to 5%. Seagate has reported similar demand.
Prices Are Moving The Wrong Way For Buyers
Scarcity has had the usual effect. Nearline drive prices, the high-capacity drives used in data centres, rose around 10% quarter on quarter in the second quarter of 2026, and US hyperscalers such as Google and Amazon, which take roughly 60% of nearline shipments, have still struggled to get what they want.
Toshiba's bet is that this lasts long enough to justify new lines. That is not guaranteed: storage has a long history of boom and glut, and capacity added by three manufacturers at once has ended badly before.
The Supply Chain Is Expanding Too
Toshiba is not acting alone, and the component makers behind hard drives have been adding capacity through the year. Resonac is expanding its Singapore plant for magnetic recording media by about 31%, from 160 million to 210 million platters a year. HOYA, the world's only supplier of the glass substrates used in modern high-capacity drives, is spending around ¥50 billion on a plant in Vietnam due to open in 2028.
TDK is expanding production of drive heads and suspensions, JX Advanced Metals is adding sputtering target capacity, and Nitto Denko plans ¥43 billion of investment through 2028 on flexible circuits for suspensions.
That list says something about how concentrated this supply chain is. A single company supplies the world's HDD glass substrates, and a handful of Japanese firms supply most of the rest, which is why capacity cannot simply be switched on when demand jumps.
What Buyers Should Plan For
For anyone procuring storage, the practical consequences are already visible. Lead times on high-capacity drives have stretched, prices are rising, and the largest cloud operators have locked up supply years ahead, which leaves smaller buyers at the back of the queue.
Organisations planning data-heavy deployments should expect to commit earlier than they are used to, and should check with their suppliers how far ahead capacity is already allocated. The relief Toshiba is promising arrives in its 2027 financial year, not this one.
It is also worth separating storage tiers properly. Flash is the right answer for data a model reads constantly during training or inference, while hard drives remain the cheap option for everything kept at rest, and the price gap between them is widening rather than closing.
The Pressure Runs Through Everything
Storage is the latest piece of data centre infrastructure to be squeezed by AI, after chips, power and cooling. Google published research this week concluding that orbital data centres would need an unprecedented launch cadence before they become viable, which is a measure of how hard the constraints on the ground have become.
The same pressure runs down the network too, which we examined when AI's uplink surge reached the fibre behind 5G towers. Each new wave of AI deployment finds the next bottleneck in the stack.
A Second Life For A Technology Written Off Too Early
Hard drives were supposed to be in managed decline, kept alive by cost advantages that flash would eventually erode. AI has given them a growth market instead, and Toshiba is spending real money to take a bigger share of it.
Whether that works depends on timing and on how long AI's appetite for cheap bulk storage holds. If demand stays where it is through 2027, Toshiba's expansion lands into a tight market, and if it cools, three manufacturers will have added capacity at the same moment, which is how storage cycles have usually ended.
