The difference between sn and wd in western numerals

There is little difference between Western Digital sn and wd, except for the maximum continuous reading and writing speed and internal inch, which are basically board-type solid-state drives.

Western Digital Hard Disk (WD) is a hard disk produced by Western Digital Company. Western Digital Corporation is a world-renowned hard disk manufacturer. The company was founded in 1970, and 1988 began to design and produce hard disks. Headquartered in Forest Lake, California, USA, it is one of the oldest hard disk manufacturers and one of the founders of IDE interface. WD has about 23,000 employees worldwide.

The company's production facilities are located in Malaysia, California and Thailand, design institutions are located in southern and northern California, and business departments are all over the world. WD Company mainly focused on IDE field after 1999 withdrew from SCSI market.