Utilize the input text as a context reference, choose the right relationship between Western Digital and Hard disk drive from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Hard disk drive maker Western Digital Corp is in advanced talks to acquire SanDisk, people familiar with the matter told Reuters on Monday.

Answer: product_or_material_produced