SanDisk is an American flash memory company founded in 1988 by Eli Harari, Sanjay Mehrotra, and Jack Yuan, originally under the name SunDisk before rebranding in 1995. The company designs and manufactures storage products built around NAND flash memory, including SD and microSD cards, CompactFlash cards, USB flash drives, and solid-state drives, and is one of the most widely used storage brands in consumer electronics.

While not a music instrument or audio gear maker in the traditional sense, SanDisk cards are a staple of music production and recording workflows. Their SD, microSD, and CompactFlash cards are commonly used as removable storage in field recorders, handheld audio recorders, samplers, grooveboxes, digital mixers, and standalone multitrack recorders, where reliable write speeds and capacity directly affect what can be tracked. Product lines such as the SanDisk Extreme, Extreme Pro, and Ultra cards are frequently specified by hardware manufacturers as compatible media for audio devices.

The SanDisk Professional sub-brand focuses on storage hardware aimed at content creators, including external SSDs, RAID enclosures, and card readers used in studio and post-production environments. The company is headquartered in Milpitas, California.

SanDisk has 17 products cataloged on Equipboard, including Computers & Peripherals. Their gear is featured by 13 artists, with the strongest followings in Electronic, Pop, and Hip Hop. Notable users include Martin Garrix, Axwell, and Sammy Virji.