KAWASAKI, Japan--(BUSINESS WIRE)--Oct 13, 2025-- Toshiba Electronic Devices & Storage Corporation (Toshiba) is first [1] in the storage industry to verify 12-disk stacking technology for high-capacity hard disk drives (HDDs). By combining this achievement with Microwave-Assisted Magnetic Recording (MAMR) technology, the company aims to introduce 40TB [2] -class 3.5-inch [3] HDDs for data centers to the market in 2027. This revolutionary stacking technology leverages advanced design and analysis technologies Toshiba has cultivated in developing thin, compact products, and adds two disks to the standard 10-disk, 3.5-inch disk track that the company uses in its nearline HDDs.