During its Q4 fiscal 2026 earnings report, Seagate shared an updated storage roadmap, revealing plans for new 50 TB HAMR hard drives to be available for customer validation in 2027. The current Mozaic 4+ platform, utilizing Heat-Assisted Magnetic Recording Technology (HAMR), supports drives up to 44 TB. By the end of 2026, Seagate anticipates Mozaic 4+ models will represent 50% of its HAMR exabytes shipped.

Seagate CFO Gianluca Romano confirmed the company is on track to surpass 5 TB per platter. With flagship HDDs using ten platters, this density will enable the 50 TB per drive capacity. The upcoming Mozaic 5+ platform, the third generation, is designed to achieve this '+5 TB per platter' density. These Mozaic 5+ drives are slated for customer qualification in 2027, followed by OEM and data center validation before wider distribution.

Further ahead, Seagate aims for a 10 TB per platter lab demonstration around 2028, potentially leading to drives near the 100 TB mark. The roadmap projects capacities from 40-44 TB in 2027/2028, scaling to 50-60 TB by 2030, and exceeding 80 TB by 2031/2032. Importantly, initial releases are targeted at Big Tech, enterprises, and AI companies, with consumer availability typically following much later.