The correct answer is: A. Samsung
Samsung is a South Korean multinational electronics corporation headquartered in Yeongtong-gu, Suwon. It is the world’s largest smartphone manufacturer and the second largest semiconductor maker. Samsung was founded by Lee Byung-chul in 1938 as a trading company. The company has since expanded into a wide range of businesses, including electronics, semiconductors, chemicals, construction, and financial services.
Intel is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world’s largest and highest valued semiconductor chip manufacturer on the basis of revenue. Intel ranked No. 49 in the 2020 Fortune 500 list of the largest United States corporations by total revenue.
Seagate Technology plc is an American multinational data storage company headquartered in Dublin, Ireland. It is the world’s second-largest hard disk drive manufacturer, after Western Digital. Seagate was founded in 1979 by Alan Shugart and Guy Kawasaki.
Western Digital Corporation is an American multinational data storage company headquartered in San Jose, California. It is the world’s largest hard disk drive manufacturer, after Seagate Technology. Western Digital was founded in 1970 by Elihu B. Patterson.
Therefore, the only option that is not a manufacturer of hard disk drives is Samsung.