SanDisk MicroSD Express Card 256GB Up to 880MB/s Read, Up to 650MB/s Write

Get Ready for Tomorrow
A PCIe® 3.1 NVMe™ interface and a standard microSD™ UHS-I interface make this card compatible with today’s devices and primed for future superspeed products.

Game-Ready Storage with Next-level Speeds
Take advantage of exponentially faster read speeds to jump into your games faster with a microSD™ card that works with Nintendo Switch™ 2 and a range of handheld gaming devices.

Exponentially Faster Performance
Up to 4.4 times faster read speeds than our fastest microSD™ UHS-I card that have adopted a version of SanDisk QuickFlow™ technology,⁷ microSD™ Express cards support speeds comparable to our mainstream portable SSD.³

Massive Time-Saver
A microSD™ Express card reduces your wait time significantly. When paired with the SanDisk PRO-READER SD Express Dual Card (sold separately), you can transfer 60 minutes of 4K UHD video⁴ shot at 30 fps in just less than 70 seconds and 1,000 10MP RAW photos in less than a minute (51.7 seconds).²

Durability you can count on
Adventure without worry knowing the microSD™ Express cards, like our standard microSD™ cards, are waterproof, temperature-proof, humidity-proof, drop-proof, shock-proof, magnetic-proof, x-ray proof, and wear-out proof.⁵

Trust us with your Content
SanDisk knows microSD™ Express inside and out. We helped initiate the standard and continue to drive its development to this day, just as we led development of the microSD™, microSD™ UHS-I, and microSD™ UHS-II card formats. We use proprietary Flash Management Techniques⁸ to produce highly stable memory. And we back the cards with a lifetime limited warranty.⁶

Heat Management Reimagined
SanDisk ThermAdapt™ helps keep devices from overheating with a specially designed enclosure and controller that uses dynamic adaptive thermal management.