Western Digital struck a deal late Tuesday to divest some of its 3.5-inch desktop hard drive assets to Toshiba. The pact would see WD buy Toshiba's storage group in Thailand, as well as give away other elements, as a condition of WD's buyout of Hitachi's storage group. By the completion of the deal, Toshiba could make desktop 3.5-inch hard drives for home users, and it could improve its ability to make specialized drives for pro uses.