Western Digital this week laid out a roadmap that stretches its 3.5-inch hard drive platform to 14 platters and pairs it with a new vertical-emitting laser for heat-assisted magnetic recording, a combination the company says will push individual drive capacities beyond 140 TB in the 2030s.
The vertical laser, developed over six years and already working in WD's labs, emits light straight down onto the disk rather than from the edge, delivering more thermal energy while occupying less vertical space -- enabling areal densities up to 10 TB per platter, up from today's 4 TB, and room for additional platters in the same enclosure. WD's first commercial HAMR drives arrive in late 2026 at 40-44 TB on an 11-platter design, ramping into volume production in 2027. A 12-platter platform follows in 2028 at 60 TB, and WD expects to hit 100 TB by around 2030.
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