Western Digital Corporation (abbreviated WDC, commonly known as simply Western Digital and WD) is an American computer hard disk drive manufacturer and data storage company. It designs, manufactures and sells data technology products, including storage devices, data center systems and cloud storage services.

Western Digital has a long history in the electronics industry as an integrated circuit maker and a storage products company. It is also one of the larger computer hard disk drive manufacturers, along with its primary competitor Seagate Technology.