---
product_id: 689455858
title: "256GB microSD Express Card - Works with Nintendo-Switch 2, Up to 880MB/s Read, Up to 650MB/s Write, 210MB/s Sustained Write, U3, C10 - SDSQXFN-256G-GN4NN"
brand: "sandisk"
price: "$153.36"
currency: USD
in_stock: true
reviews_count: 13
category: "Sandisk"
url: https://www.desertcart.us/products/689455858-256gb-microsd-express-card-works-with-nintendo-switch-2-up
store_origin: US
region: United States of America
---

# 880MB/s read speed 256GB ultra storage ThermAdapt heat management 256GB microSD Express Card - Works with Nintendo-Switch 2, Up to 880MB/s Read, Up to 650MB/s Write, 210MB/s Sustained Write, U3, C10 - SDSQXFN-256G-GN4NN

**Brand:** sandisk
**Price:** $153.36
**Availability:** ✅ In Stock

## Summary

> 🚀 Level up your storage game with SanDisk’s microSD Express — speed, space, and stamina in one sleek card!

## Quick Answers

- **What is this?** 256GB microSD Express Card - Works with Nintendo-Switch 2, Up to 880MB/s Read, Up to 650MB/s Write, 210MB/s Sustained Write, U3, C10 - SDSQXFN-256G-GN4NN by sandisk
- **How much does it cost?** $153.36 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/689455858-256gb-microsd-express-card-works-with-nintendo-switch-2-up)

## Best For

- sandisk enthusiasts

## Why This Product

- Trusted sandisk brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Unmatched Durability:** Built to survive every adventure—waterproof, shockproof, magnetic-proof, and X-ray proof for worry-free use anywhere.
- • **Smart Thermal Control:** SanDisk ThermAdapt tech keeps your card cool under pressure, ensuring consistent high-speed performance without overheating.
- • **Massive 256GB Capacity:** Store your entire gaming library, 4K videos, and RAW photos without compromise—carry your world in your pocket.
- • **Blazing-Fast Load Times:** Experience near-instant game and file access with up to 880MB/s read speeds, perfect for Nintendo Switch 2 and beyond.
- • **Next-Gen PCIe-NVMe Interface:** Future-proof your device compatibility with cutting-edge microSD Express technology, delivering SSD-like performance.

## Overview

The SanDisk 256GB microSD Express Card is a powerhouse storage solution designed for the Nintendo Switch 2 and next-gen devices. Featuring ultra-fast PCIe-NVMe interface speeds up to 880MB/s read and 650MB/s write, it delivers SSD-like performance for rapid game loading and massive 4K/8K content capture. Engineered for durability with waterproof, shockproof, and thermal management technologies, this card ensures reliable, high-speed data transfer and long-lasting use. Perfect for professionals and gamers who demand speed, capacity, and resilience in a compact form factor.

## Description

Unleash your creative potential and dive into new experiences with SANDISK microSD Express, the next-gen microSD card for those who refuse to settle. Now with a PCIe Gen 3-NVMe interface, the new card delivers performance comparable to our mainstream portable SSD.[3] Up to 4.4 times faster than our fastest microSD UHS-I cards,[7] they enable exponentially faster camera roll offloads and 2-hour HD movie (2GB) download transfers in less than 3.3 seconds while using SANDISK PRO-READER SD Express Dual Card2 (sold separately). Works with Nintendo Switch 2 to deliver super quick load times and an ultra-smooth, immersive gaming experience. Create next-level immersive content with a card that supports up to 5.3K video[4] capture today and up to 8K video4 in possible new devices. SANDISK ThermAdapt technology helps keep heat generated by high speeds within reliable operating limits with a specially designed enclosure and an adaptive thermal controller. Backwards compatible with microSD UHS-I devices, SANDISK microSD Express technology readies you—the next generation of creators and explorers—for the future of superspeed devices

Review: With over 1GB/s file transfer performance, this card is still the best on the market - Update 06/07/2025, Comparing to Onn's Express 256: There is a new budget microSD 256 Express card from Onn that appeared in retail this week coinciding with the launch of the Switch 2. It claims to support up to 800MB/s reads and 600MB/s writes. I picked one up to compare. With larger stress tests (Random reads and writes going up to 5GB instead of the 1GB test I show here), this SanDisk can see its transfer rate drop to a minimum of 400GB/s on writes. For the Onn device, on writes the rate drops to 200MB/s typically, but sometimes as low as 150MB/s as the firmware seems to have trouble keeping up (it stalls completely), nearly 3 times slower on average than the SanDisk. What's worse is that it drops to 400GB/s even for transfers as small as 2GB, 300GB/s for 3GB, and 200GB/s from there on up, while the SanDisk still manages to hold minimum 600GB/s. Keep in mind that most larger games for the Switch 2 are about 20GB or more, and there are a few 64GB or larger. I do not currently own a PNY card to test, but online evidence suggests that it too is slower than the SanDisk, but may be faster than the Onn device. With the way the Onn card stalls on writing, literally stopping occasionally for upwards of a second while testing, I could never recommend it. You get what you pay for with the SanDisk. Full review follows. REVIEW: During play, the Onn express card may be able to keep up due to small transfers and minimal loads, but its stalls will affect things, and during download and game management on the Switch 2, you will definitely see a time impact, probably significant. The good news is that the Onn express card was able to hold up on read tests without stalls, with the same 750MB/s as the SanDisk, but it never really went above 750MB/s for even smaller transfers while the Sandisk peaked at about 990MB/s, above their claimed rate. I am sure some caching was involved in that number, but the system caches the Onn in the same way, so there is a significant difference. Great high-speed card if you have a reader that supports Express. This card also outperforms even on a standard controller due to its rapid response time and excellent IOPs (measure of the number it can handle per second). Does well enough to be considered as an external drive on the Mac, though an M.2 reader enclosure will outperform it on specs. Can't beat it for portability. For sustained throughput on the SanDisk Express reader, this can't be beat, easily outperforming any other card I have from 4X to 20X faster. Camera file transfers happen at about 1GB/s. No drivers needed for any recent OS, though Ubuntu has a recent bug that will prevent those devices from attaining full speed unless an external Express-capable reader is used.
Review: Fast. Reliable. Works great with Switch 2. - Used in Switch 2, this has been super-easy to install, format and has been working very well. No hickups, very fast. Reasonable price for the new Express card. Will be my go-to for other applications, too

## Features

- NEXT GEN GAMING: Works with Nintendo Switch 2.
- READY FOR TOMORROW. Ready for future products with a PCIe-NVMe interface; performs at UHS-I speeds with microSD UHS-I and UHS-II devices.
- EXPONENTIALLY FASTER PERFORMANCE. Up to 4.4 times faster transfer speeds than our fastest microSD UHS-I cards [9]. Transfer a 2-hour HD movie in less than 3.5 seconds [1]; save up to 2.8 minutes transferring 60 minutes of 4K UHD video [4] shot at 30 fps when paired with the SanDisk PRO-READER SD Express Dual Card (sold separately) [9]
- DURABILITY YOU CAN COUNT ON: Cards are waterproof, temperature-proof, humidity-proof, drop-proof, shock-proof, magnetic-proof, x-ray proof, and wear-out proof [5].
- HEAT MANAGEMENT REIMAGINED. SanDisk ThermAdapt helps keep devices from overheating with a specially designed enclosure and controller that uses dynamic adaptive thermal management.
- MASSIVE TIME-SAVER. Transfer 60 minutes of 4K UHD video[4] shot at 30 fps in just less than 70 seconds and 1,000 10MP RAW photos in less than a minute (51.7 seconds) when paired with SanDisk PRO-READER SD Express Dual Card (sold separately).[2]

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DFQGVLYF |
| Best Sellers Rank | #71 in Micro SD Memory Cards |
| Color | Black |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,325) |
| Date First Available | August 30, 2024 |
| Hardware Interface | microSDHC |
| Item Dimensions LxWxH | 0.59 x 0.43 x 0.04 inches |
| Item Weight | 0.009 ounces |
| Item model number | SDSQXFN-256G-GN4NN |
| Manufacturer | SanDisk Technologies, Inc. |
| Product Dimensions | 0.59 x 0.43 x 0.04 inches |
| Read Speed | 880 Megabytes Per Second |
| Secure Digital Association Speed Class | Class 10 |
| Special Feature | Drop Proof, Magnetic Proof, Water Proof, Wearout Proof, X Ray Proof |
| UPC | 619659202064 |
| Warranty Type | Lifetime |
| Write Speed | 100.0 |

## Product Details

- **Brand:** Sandisk
- **Compatible Devices:** Camera, Gaming Console, Personal Computer
- **Flash Memory Type:** Micro SD
- **Memory Storage Capacity:** 256 GB
- **Model Name:** SDSQXFN-256G-GN4NN

## Images

![256GB microSD Express Card - Works with Nintendo-Switch 2, Up to 880MB/s Read, Up to 650MB/s Write, 210MB/s Sustained Write, U3, C10 - SDSQXFN-256G-GN4NN - Image 1](https://m.media-amazon.com/images/I/71h8AjGvWOL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ With over 1GB/s file transfer performance, this card is still the best on the market
*by B***T on March 15, 2025*

Update 06/07/2025, Comparing to Onn's Express 256: There is a new budget microSD 256 Express card from Onn that appeared in retail this week coinciding with the launch of the Switch 2. It claims to support up to 800MB/s reads and 600MB/s writes. I picked one up to compare. With larger stress tests (Random reads and writes going up to 5GB instead of the 1GB test I show here), this SanDisk can see its transfer rate drop to a minimum of 400GB/s on writes. For the Onn device, on writes the rate drops to 200MB/s typically, but sometimes as low as 150MB/s as the firmware seems to have trouble keeping up (it stalls completely), nearly 3 times slower on average than the SanDisk. What's worse is that it drops to 400GB/s even for transfers as small as 2GB, 300GB/s for 3GB, and 200GB/s from there on up, while the SanDisk still manages to hold minimum 600GB/s. Keep in mind that most larger games for the Switch 2 are about 20GB or more, and there are a few 64GB or larger. I do not currently own a PNY card to test, but online evidence suggests that it too is slower than the SanDisk, but may be faster than the Onn device. With the way the Onn card stalls on writing, literally stopping occasionally for upwards of a second while testing, I could never recommend it. You get what you pay for with the SanDisk. Full review follows. REVIEW: During play, the Onn express card may be able to keep up due to small transfers and minimal loads, but its stalls will affect things, and during download and game management on the Switch 2, you will definitely see a time impact, probably significant. The good news is that the Onn express card was able to hold up on read tests without stalls, with the same 750MB/s as the SanDisk, but it never really went above 750MB/s for even smaller transfers while the Sandisk peaked at about 990MB/s, above their claimed rate. I am sure some caching was involved in that number, but the system caches the Onn in the same way, so there is a significant difference. Great high-speed card if you have a reader that supports Express. This card also outperforms even on a standard controller due to its rapid response time and excellent IOPs (measure of the number it can handle per second). Does well enough to be considered as an external drive on the Mac, though an M.2 reader enclosure will outperform it on specs. Can't beat it for portability. For sustained throughput on the SanDisk Express reader, this can't be beat, easily outperforming any other card I have from 4X to 20X faster. Camera file transfers happen at about 1GB/s. No drivers needed for any recent OS, though Ubuntu has a recent bug that will prevent those devices from attaining full speed unless an external Express-capable reader is used.

### ⭐⭐⭐⭐⭐ Fast. Reliable. Works great with Switch 2.
*by D***S on October 3, 2025*

Used in Switch 2, this has been super-easy to install, format and has been working very well. No hickups, very fast. Reasonable price for the new Express card. Will be my go-to for other applications, too

### ⭐⭐⭐⭐⭐ Way Bigger Than I Thought! Holy Cow!
*by T***E on November 29, 2025*

I bought this because I was preparing to get a Switch 2, and I buy my games almost entirely digitally, meaning I wanted to have as much storage space as was feasible. At first, I thought the price was a bit much, but I live in the United States and tariffs suck, so I resigned myself to paying it as an “Unavoidable tax.” Little that I know that this was so expensive because it’s way bigger than you think it is. I was expecting switch games to be at least half as big as they are on other consoles from a file size perspective. Boy was I surprised when I downloaded half my entire switch library onto this thing and it’s not even a fourth of the way full! This is great! I don’t think most people are going to need a size this big, in fact, I think most people are going to need something not even half this size. The write speed is pretty fast, and it’s made to be compatible with the Switch 2, so no problems there. If you are like me, and do everything entirely digitally and hate having to re-download things on a whim just to replay them, then sure, spring for this size if you’ve got the cash. Otherwise, I would definitely consider down scaling to something smaller for cheaper. It’s great, but you don’t need it to be this big (from a Storage standpoint, the stick itself is very, VERY tiny!)

## Frequently Bought Together

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-14*