The move will also create 2,500 jobs this year, the deputy secretary general of the Thailand Board of Investment (BoI), Ajarin Pattanapanchai, said on Monday.
The expansion involves the company's subsidiary, HGST (Thailand) Co Ltd.
Two global manufacturers of hard-disk drives are located in Thailand.
The other firm is Seagate Technolgy (Thailand).
They received tax privileges from the BoI between 2007 to 2016 to produced products worth more than Bt30 billion.
According to the privilege conditions, they have to invest in research and development worth more than Bt500 million.