Western Digital manufactures hard disk drives that store the majority of the world's data. The company designs and produces its own recording heads and magnetic media, maintaining a vertically integrated manufacturing footprint in the U.S., China, and Southeast Asia. Western Digital organizes its business into three segments: Cloud, Client, and Consumer. The Cloud business is the largest, supplying high-capacity nearline drives to hyperscale cloud providers like Microsoft, Google, and Amazon under long-term agreements. The Client and Consumer segments sell drives for personal computers and retail external storage. The company’s business model depends on increasing drive capacity and areal density to deliver a lower total cost of ownership for customers. Western Digital uses proprietary technologies like UltraSMR and Heat-Assisted Magnetic Recording (HAMR) to increase storage capacity per disk, which reduces manufacturing costs over time. Following the spin-off of its flash memory business, Western Digital operates as a pure-play hard drive manufacturer. Management focuses on AI-driven demand, arguing that the large-scale data generated by AI workloads creates a persistent need for high-capacity hard drives. The company maintains a technology roadmap targeting drives with over 44TB of capacity to support these data-intensive applications.