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

SanDisk Extreme microSD Express 256GB Memory Card (SDSQXFN-256G-GN4NN) is a next-generation high-performance storage solution built for creators, gamers, and professionals who demand exceptional speed. Leveraging the PCIe Gen 3 NVMe interface alongside backward-compatible UHS-I support, this microSD Express card delivers blazing-fast read speeds of up to 880 MB/s and write speeds of up to 650 MB/s. It is ideal for capturing high-resolution photos, recording 5.3K and 4K video, accelerating game load times on compatible handheld gaming devices, and transferring large files in seconds. Featuring SanDisk ThermAdapt technology and industry-leading durability, this card is ready for both today’s devices and future microSD Express-enabled hardware.

Product Features

Next-Generation microSD Express Performance

Built with a PCIe Gen 3 NVMe interface, the SanDisk Extreme microSD Express card delivers breakthrough performance with read speeds of up to 880 MB/s and write speeds of up to 650 MB/s, dramatically reducing file transfer times.

Optimized for Professional Content Creation

Capture high-resolution photos, continuous RAW image bursts, and smooth 5.3K and 4K video without dropped frames. The card’s sustained write performance supports demanding creative workflows.

Backward Compatibility

The card works with current microSD UHS-I and UHS-II devices while unlocking significantly higher performance when used in compatible microSD Express devices, making it a future-ready storage investment.

ThermAdapt Heat Management

SanDisk ThermAdapt technology incorporates an adaptive thermal controller and specially engineered enclosure to help maintain reliable performance during sustained high-speed data transfers.

Rugged and Reliable Design

Built for challenging environments, the card is waterproof, temperature-proof, humidity-proof, drop-proof, shock-proof, magnetic-proof, X-ray proof, and wear resistant, helping protect your valuable data wherever you go.

Ideal for Gaming and High-Speed Workflows

The ultra-fast transfer speeds reduce game loading times on compatible handheld gaming devices while significantly accelerating backups, media imports, and professional editing workflows when paired with a compatible microSD Express card reader.

Product Specifications

• Brand: SanDisk
• Product Series: Extreme microSD Express
• Model: SDSQXFN-256G-GN4NN
• Product Type: microSD Express Memory Card
• Storage Capacity: 256GB
• Form Factor: microSDXC
• Interface: PCIe Gen 3 NVMe
• Backward Compatibility: microSD UHS-I and UHS-II devices
• Maximum Sequential Read Speed: Up to 880 MB/s
• Maximum Sequential Write Speed: Up to 650 MB/s
• Minimum Sustained Write Speed: 210 MB/s
• Speed Class: Class 10
• UHS Speed Class: U3
• Application Performance Class: A1
• Supported Recording: 5.3K video, 4K UHD video, Full HD video, RAW photography
• ThermAdapt Technology: Yes
• Durability: Waterproof, temperature-proof, humidity-proof, drop-proof, shock-proof, magnetic-proof, X-ray proof, and wear-out proof
• Operating Temperature: -25°C to 85°C
• Storage Temperature: -40°C to 85°C
• Dimensions: 15 × 11 × 1 mm
• Weight: Approximately 0.26 g
• Compatibility: microSD Express, microSD UHS-I, and microSD UHS-II compatible devices including smartphones, tablets, action cameras, drones, handheld gaming devices, and laptops
• Warranty: Limited Lifetime Warranty