SanDisk Extreme microSD Express 256GB
Experience next-generation storage performance with the SanDisk Extreme microSD Express 256GB Memory Card, model SDSQXFN-256G-GN4NN.
Designed with a PCIe Gen 3 NVMe interface, this high-performance microSDXC card delivers sequential read speeds of up to 880MB/s and sequential write speeds of up to 650MB/s. For demanding workloads, the 256GB version has a minimum sustained write speed of 210MB/s, although actual performance depends on the compatible host device and operating conditions.
Fast Performance for Gaming & Content Creation
The high-speed interface makes the SanDisk microSD Express suitable for compatible handheld gaming devices, helping reduce loading times and providing a smoother gaming experience. It can also be used for high-resolution content and supports up to 5.3K video capture on compatible devices, with support for 8K video possible on future compatible hardware.
Next-Generation PCIe NVMe Technology
Unlike conventional UHS-I microSD cards, the microSD Express platform combines a standard microSD form factor with PCIe Gen 3 NVMe technology. This provides significantly higher potential transfer performance while maintaining compatibility with microSD UHS-I devices, where the card operates at UHS-I speeds.
Durable Design
The card is designed to withstand demanding environments and is rated as resistant to water, temperature extremes, humidity, drops, shock, magnets, X-rays and wear-out. SanDisk also specifies an operating temperature range of -25°C to 85°C.
Ideal For
- Handheld gaming devices
- Action cameras
- Drones
- Android smartphones and tablets
- High-resolution video recording
- Photography and large media files
- Fast file transfers
- Expanding compatible device storage
Important: Maximum speeds require a compatible microSD Express host/device. When used in a conventional microSD UHS-I or UHS-II device, performance will be limited by that device/interface.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | SanDisk |
| Product | SanDisk microSD Express Card |
| Capacity | 256GB |
| Model Number | SDSQXFN-256G-GN4NN |
| Form Factor | microSDXC |
| Interface | PCIe Gen 3 NVMe |
| Maximum Sequential Read Speed | Up to 880MB/s |
| Maximum Sequential Write Speed | Up to 650MB/s |
| Minimum Sustained Write Speed | 210MB/s |
| Dimensions | 14.99 × 10.92 × 1.02 mm |
| Weight | 0.26g |
| Operating Temperature | -25°C to 85°C |
| Storage Temperature | -40°C to 85°C |
| Compatibility | microSD Express, microSD UHS-I and microSD UHS-II compatible devices |
| Video Support | Up to 5.3K on compatible devices; future 8K capability |
| Warranty | Lifetime Limited Warranty* |
Specifications and performance can vary depending on the host device, interface, usage conditions and other factors. SanDisk states that actual usable storage capacity is lower than the advertised 256GB because 1GB is calculated as 1 billion bytes.
Key Features
- 256GB storage capacity
- Up to 880MB/s read speed
- Up to 650MB/s write speed
- 210MB/s minimum sustained write speed
- PCIe Gen 3 NVMe interface
- microSDXC form factor
- Designed for next-generation high-speed devices
- Compatible with microSD UHS-I devices
- Suitable for handheld gaming
- Supports high-resolution video applications
- Resistant to water, shock, drops, magnets, X-rays and temperature extremes
- Compact 14.99 × 10.92 × 1.02mm design
- Lifetime limited warranty
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