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Western Digital Corporation

Western Digital makes hard drives and flash memory chips that store data for computers and data centers.

Western Digital builds the hardware that holds your data. When you save a photo, a document, or a game, it lives on a physical chip or spinning disk somewhere. The company makes two kinds of these storage products: hard disk drives, the older spinning-disk technology, and NAND flash memory, the faster solid-state chips found in phones and laptops. It sells these mostly to other businesses, not directly to you. Big cloud providers (like the companies that run data centers), computer makers, and device manufacturers are its main customers. It books roughly $12–13 billion in annual revenue, with flash memory now the larger slice, around 60%, and hard drives the rest.

The business splits into two clear segments. The flash segment makes NAND chips and solid-state drives, the tiny chips with no moving parts that power phones, laptops, and fast data-center storage. The hard drive segment makes good old-fashioned disk drives, which are cheap per gigabyte and still dominate massive data centers that need to store huge amounts of information for years. Think of it as the difference between a fast sports car (flash) and a giant durable moving truck (hard drives) — both haul data, but you pick based on speed and cost. The company often sells to only a handful of giant customers, so a few big buyers swinging their orders up or down can move the needle fast.

Western Digital is a spin-off story people watch. It split off its flash-memory business — now the separately traded company SanDisk — in early 2025, a major turning point that let each business focus on its own market. The company has been careful with cash: it trimmed debt and returned money to shareholders, and its results now hinge heavily on memory chip prices, which swing like a roller coaster. When AI data centers boom and chip prices rise, Western Digital feels it fast. When prices crash, profits dive. That cycle is the whole ballgame.

Saved answer · last researched 13 Oct 2026