Western Digital makes hard disk drives, the spinning magnetic storage devices that sit inside the giant computers running the internet. The company sells these drives in three ways: to massive cloud data centers that need to store enormous amounts of data cheaply, to computer manufacturers putting drives inside laptops and desktops, and to everyday consumers through retail stores. After spinning off its flash memory business into a separate company called Sandisk in February 2025, Western Digital is now a pure hard disk drive company. Cloud customers now account for 88% of what is left. The diagram below traces where the money goes.
Five years of financial data tell a dramatic story in two acts. Act one runs through 2022, when revenue hit $18.8 billion and cash was flowing. Act two began in 2023, when the business fell off a cliff.
The 2023 collapse was not a company-specific failure. Cloud customers simply stopped ordering as many drives. Factories kept running but had nothing to ship. Western Digital had to absorb roughly $200 million in manufacturing costs in 2023 for factories that were barely being used. The same thing happened in 2024, with about $155 million in those same idle-factory costs. Free cash flow, the money left over after paying all the bills and building the business, swung to negative $1.2 billion in 2023 and negative $0.8 billion in 2024. The company was burning cash while waiting for customers to come back.
Customers did come back in 2025. Revenue jumped 51% to $9.5 billion, driven almost entirely by cloud data centers ordering more high-capacity drives. Gross margin climbed to 38.8%, the highest in the five-year window, because Western Digital was selling bigger, more expensive drives rather than just selling more units at low prices. Free cash flow turned positive at $1.3 billion. Net debt dropped from $7.6 billion in 2024 to $4.8 billion in 2025, helped by paying down $2.78 billion in debt during the year.
The 2025 recovery looks strong on paper. But the five-year arc also shows just how violent the swings can be. Revenue more than halved between 2022 and 2023. That kind of volatility is not unusual for this business. It is baked in.
The separation created a more focused company but also a more fragile one. Before the split, Western Digital had two different types of storage technology under one roof. Now it has one. The risk factors that come with that concentration are not small.
The most pressing documented risks are customer concentration and tariffs. Three customers now each represent 10% or more of total revenue. Losing any one of them would be a serious hit. On tariffs, the company acknowledged that rising import costs could squeeze profits if customers refuse to absorb price increases. Western Digital makes its drives in Thailand, Malaysia, the Philippines, China, and the United States, meaning the supply chain crosses many borders that are currently caught up in trade disputes. The company also relies on a small number of sole-source suppliers for certain critical components. If one of those suppliers cannot deliver, production stops.
There is also the forecasting problem. Predicting how many drives cloud customers will order is extremely difficult. When Western Digital guesses too high, it builds drives nobody buys, factories sit idle, and the company absorbs millions in unabsorbed overhead costs, exactly what happened in 2023 and 2024. There is no easy fix for this. It is a structural feature of selling to a small number of very large customers who decide their own build schedules.
One more watch item sits at the intersection of tax and geography. Western Digital benefits from tax holidays in the Philippines and Thailand, countries where most of its 40,000 employees work. Those holidays expire at various dates between 2026 and 2033. As they expire, the company's tax bill will likely rise. A new global minimum tax framework is also being adopted in most of the countries where Western Digital operates, which the company expects will increase future tax obligations.