Western Digital Corporation (WD) is an American computer data storage company founded in 1970, one of the world's largest manufacturers of hard disk drives (HDDs) and solid-state drives (SSDs), serving consumers, businesses, and enterprise data centers.

Western Digital's extensive portfolio includes internal and external drives under its own brand and subsidiaries including WD, SanDisk (acquired 2016), and G-Technology. Their product lines are color-coded by use case.