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TechRadar
TechRadar
Wayne Williams

Toshiba plans 40TB HDD in 2027 with 12 platters - but I fear it is way too little, way too late

Toshiba Seagate TechRadar
Computer service engineer technician workplace repairing fixing disassembled HDD hard drive data disc SSD, backup part of PC or laptop. Recovery, maintenance work, access file. Profession repairman.
  • Seagate is already testing its 40TB HAMR drives, while Toshiba eyes 2027 launch
  • Toshiba’s drives use 12-disk stacking technology and Microwave-Assisted Magnetic Recording
  • Seagate is planning 44TB models for when Toshiba’s 40TB models arrive

Back in May 2025, we reported that Seagate had shipped limited units of its 40TB HDDs built on its Mozaic HAMR platform. These drives use Heat-Assisted Magnetic Recording to store 4TB per platter across ten platters, setting a new benchmark at the time for mechanical storage density.

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