SanDisk Extreme microSD Express 256GB SDSQXFN-256G-GN4NN

The SanDisk Extreme microSD Express 256GB  is a next-generation microSD Express (microSDXC) memory card that combines the compact size of a microSD card with the high performance of PCIe Gen 3 NVMe technology.

It is designed for demanding applications such as handheld gaming, professional content creation, high resolution video recording, and rapid file transfers. The card is also backward compatible with standard microSD UHS-I devices, operating at UHS-I speeds when used in older hardware.

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 a range of handheld gaming devices.

Exponentially faster performance

Up to 3.5 times faster read speeds than our fastest microSD™ UHS-I card that have adopted a version of SANDISK QuickFlow™ technology, microSD™ Express cards support breakthrough speeds that redefine what’s possible.

A massive time-saver

A microSD™ Express card helps reduce your wait time significantly. When paired with the SANDISK PRO-READER SD Express Dual Card (sold separately), our 1TB model transfers up to 60 minutes of 4K UHD video shot at 30 fps in just less than 15 seconds and up to 1,000 10MP RAW photos in less than 50 seconds.

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.

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™ and microSD™ UHS-I card formats. We use proprietary Flash Management Techniques to produce highly stable memory. And we back the cards with a lifetime limited warranty.

Heat Management Reimagined

SANDISK ThermAdapt™ technology helps keep devices from overheating with a specially designed enclosure and controller that uses dynamic adaptive thermal management.