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SanDisk microSD Express microSD Card, Up to 880MB/s Read, Up to 480MB/s WriteSandisk Technologies, Inc.

SanDisk 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

4.6 out of 5 stars 255 ratings

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We don't know when or if this item will be back in stock.
Brand SanDisk
Model Name SDSQXFN-256G-GN4NN
Flash Memory Type Micro SD
Memory Storage Capacity 256 GB
Compatible Devices Gaming Console, Personal Computer, Camera

About this item

  • 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]

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From the manufacturer

M01
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

SanDisk 256GB microSD Express microSD Card

Merchant Video
M04

Exponentially Faster Performance

Up to 8.8x faster read speeds than our standard microSD UHS-I card(8). 256GB(13) microSD Express cards deliver up to 880MB/s(1) read speeds, up to 650MB’s(1) write speeds when used with SanDisk PRO-READER SD Express Dual Card (sold separately).

M05_1

A Massive Time-Saver

Saves you up to 2.8 minutes transferring 60 minutes of 4K UHD video(4) shot at 30 fps and up to 2.9 minutes transferring 2,000 10MP RAW photos.(9)

M05_2

Durability You Can Count On

This card is waterproof, temperature-proof, humidity-proof, drop-proof, shock-proof, magnetic-proof, x-ray proof, and wear-out proof.(5)

M05_3

Trust Us with Your Content

As a leader in microSD card design and development, Sandisk uses proprietary Flash Management Techniques(10) to produce highly stable memory.

M05_4

Full File Recovery

included RescuePRO Deluxe file recovery software offer, you can recover files images you accidentally deleted free of charge for two full years.(6)

(1) [256GB] Up to 880MB/s read speeds. Up to 650MB/s write speeds. 210MB/s minimum sustained write speed. Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes. (2) Based on internal testing with the SanDisk PRO-READER SD Express Dual Card against the 64GB-128GB SanDisk Extreme PRO UHS-II SD cards with SanDisk Extreme PRO SD UHS-II Card USB-C Reader/Writer. (3) Based on internal testing with the SanDisk PRO-READER SD Express Dual Card against the 1TB-2TB SanDisk Portable SSD. (4) Compatible device required. Full HD (1920 x 1080), 4K (4096x2160), 4K UHD (3840x2160), 5.3K (5312x2988) and 8K (7,680x4,320) video support may vary based upon host device, file attributes and other factors. See official SanDisk website for details. (5) Card only. See product packaging or official SanDisk website for additional information and limitations. (6) Registration required. Terms and conditions apply. (8) Based on internal testing with the SanDisk PRO-READER SD Express Dual Card against the 512GB SanDisk Ultra Lite UHS-I microSDXC card. Performance may be lower depending upon host device, interface, usage conditions and other factors. (9) Based on internal testing with the SanDisk PRO-READER SD Express Dual Card against the 128GB-512GB SanDisk Extreme PRO UHS-I microSDXC card with SanDisk Professional PRO-READER SD & microSD. Performance may be lower depending upon host device, interface, usage conditions and other factors. (10) See Western Digital White Paper- Flash 101 and Flash Management. A detailed overview of flash and flash management (August 2018). (11) See Flash Memory Summit, 2023 Flash Memory Timeline (2023). (12) Based on stated speeds. Based on internal testing; performance may be lower depending upon host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes. (13) 1GB=1,000,000,000 bytes. Actual user storage less.

Sandisk, the Sandisk logos, RescuePRO and SanDisk Extreme are registered trademarks or trademarks of Sandisk Corporation or its affiliates in the US and/or other countries. All other marks are the property of their respective owners. Product specifications subject to change without notice. Pictures shown may vary from actual products.

2025 Sandisk Corporation or its affiliates. All rights reserved.

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SanDisk 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
SanDisk 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
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PriceCurrently unavailable.$41.98-21% $18.99
List:$23.99
$61.14
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Get it as soon as Sunday, Jul 27
Get it as soon as Friday, Aug 1
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Product information

Technical Details

Collapse all
Color ‎Black
Special Feature ‎X Ray Proof, Water Proof, Magnetic Proof, Wearout Proof, Drop Proof
Read Speed ‎880 Megabytes Per Second
Item Weight ‎0.26 Grams
Warranty Type ‎Lifetime
Write Speed ‎100.0
Hardware Interface ‎microSDHC
Secure Digital Association Speed Class ‎Class 10
Manufacturer ‎SanDisk Technologies, Inc.
UPC ‎619659202064
Item model number ‎SDSQXFN-256G-GN4NN
Item Weight ‎0.009 ounces
Product Dimensions ‎0.59 x 0.43 x 0.04 inches
Item Dimensions LxWxH ‎0.59 x 0.43 x 0.04 inches
ASIN ‎B0DFQGVLYF
Date First Available ‎August 30, 2024

Additional Information

Customer Reviews
4.6 out of 5 stars 255 ratings

4.6 out of 5 stars
Best Sellers Rank

Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.

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SanDisk 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


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Product 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

Customer reviews

4.6 out of 5 stars
255 global ratings

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Customers say

Customers find the microSD card works well with their Switch and appreciate its great speed. They praise its quality and value for money, with one customer noting it's the most reliable microSD card they've used. They like how easy it is to install, with one mentioning it's as simple as sliding in a game cartridge, and appreciate its double storage capacity.

25 customers mention "Functionality"22 positive3 negative

Customers report that the microSD card works well with Nintendo Switch and Switch 2 consoles, with one customer noting it outperforms even on a standard controller.

"I bought this microSD Express card for my Nintendo Switch 2. Works great and no issues...." Read more

"So far so good: no issues..." Read more

"...I’ve never had to worry about them at all. Functional, decent value, fast speeds, good enough storage for now on my Switch 2, and easy to install..." Read more

"This is the ONLY card that works with my DJI Action5 Pro. I just wish it was a bigger size. 256 is okay 512GB or 1TB is more like it and what I NEED." Read more

7 customers mention "Speed"7 positive0 negative

Customers appreciate the flash memory's speed, with one describing it as blazing fast.

"...I’ve never had to worry about them at all. Functional, decent value, fast speeds, good enough storage for now on my Switch 2, and easy to install..." Read more

"...Great high-speed card if you have a reader that supports Express...." Read more

"Blazing fast and works great with my Switch 2. Worth it." Read more

"Great speed and capacity for the Switch 2. Allows you to double the amount of available storage." Read more

6 customers mention "Value for money"6 positive0 negative

Customers find the flash memory card worth its price.

"...I’ve never had to worry about them at all. Functional, decent value, fast speeds, good enough storage for now on my Switch 2, and easy to install..." Read more

"...If you need extra storage and find this card at a decent price then why not." Read more

"Blazing fast and works great with my Switch 2. Worth it." Read more

"Does it’s job and I got a good price (before the switch tax), but I do wish that they had a affordable one terabyte version (or even 512)" Read more

5 customers mention "Quality"5 positive0 negative

Customers find the microSD card to be of excellent quality, with one customer specifically noting its reliability.

"...SanDisk is the most reliable microSD on the market right now. I don’t trust anyone more than them. I’ve never had to worry about them at all...." Read more

"...as they come into stock, but will stick with this brand because I like the quality...." Read more

"...Great product." Read more

"Good quality, fast delivery" Read more

4 customers mention "Ease of installation"4 positive0 negative

Customers find the microSD card easy to install, with one mentioning that it was immediately recognized by the Nintendo Switch.

"...good enough storage for now on my Switch 2, and easy to install under the Switch 2 stand." Read more

"...This card works perfectly with the switch 2. I had no problem loading it into the system." Read more

"Installed and immediately recognized by the switch 2. I would recommend it." Read more

"...a hitch and I have since downloaded games from the eShop and everything is loading and playing perfectly. Pretty much all you need to know right?" Read more

3 customers mention "Ease of movement"3 positive0 negative

Customers find the microSD card easy to move, with one mentioning it's as simple as sliding in a Switch 2 game cartridge.

"...After I was able to move games over and play them without issue. This is day one, so no idea yet what the longevity of the card will be...." Read more

"...It's as easy as sliding in a Switch 2 game cartridge in the Switch 2." Read more

"Works for the new switch 2. Easy to move the stand on the back of the switch 2 and put in memory card. 5 stars" Read more

3 customers mention "Storage capacity"3 positive0 negative

Customers appreciate the storage capacity of the microSD card, with several noting it doubles the available space, and one mentioning it provides more space for games.

"...Functional, decent value, fast speeds, good enough storage for now on my Switch 2, and easy to install under the Switch 2 stand." Read more

"Works great with my switch 2. Glad I got it so now I have more space for more games and more fun." Read more

"Great speed and capacity for the Switch 2. Allows you to double the amount of available storage." Read more

With over 1GB/s file transfer performance, this card is still the best on the market
5 out of 5 stars
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.
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Top reviews from the United States

  • Reviewed in the United States on May 17, 2025
    This is the required type of microSD for the Nintendo Switch 2. It’s really too bad that SanDisk only makes them at a max size of 256GB right now. I plan to buy the 1TB version once they start selling it. SanDisk is the most reliable microSD on the market right now. I don’t trust anyone more than them. I’ve never had to worry about them at all. Functional, decent value, fast speeds, good enough storage for now on my Switch 2, and easy to install under the Switch 2 stand.
    42 people found this helpful
    Report
  • Reviewed in the United States on July 15, 2025
    I bought this microSD Express card for my Nintendo Switch 2. Works great and no issues. The package only has the microSD Express card inside a small clear plastic case. No microSD to SD memory card adapter included.

    I would definitely wait for 512GB or 1TB version. With Mario Kart World and updates for Switch 1 games I have, the microSD Express card is already half full. If you need extra storage and find this card at a decent price then why not.
  • Reviewed in the United States on March 29, 2025
    This is the ONLY card that works with my DJI Action5 Pro. I just wish it was a bigger size. 256 is okay 512GB or 1TB is more like it and what I NEED.
    Customer image
    4.0 out of 5 stars
    Gets the job done.

    Reviewed in the United States on March 29, 2025
    This is the ONLY card that works with my DJI Action5 Pro. I just wish it was a bigger size. 256 is okay 512GB or 1TB is more like it and what I NEED.
    Images in this review
    Customer image
    5 people found this helpful
    Report
  • Reviewed in the United States 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.
    Customer image
    5.0 out of 5 stars
    With over 1GB/s file transfer performance, this card is still the best on the market

    Reviewed in the United States 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.
    Images in this review
    Customer image
    36 people found this helpful
    Report
  • Reviewed in the United States on June 25, 2025
    I used h2testw to confirm successful write & read+verify functionality before inserting it into the Switch 2 and encountered no problems. I just had to wipe the card which required a small Switch 2 update and restart. After I was able to move games over and play them without issue. This is day one, so no idea yet what the longevity of the card will be. If I encounter issues I will plan to loop back and note them.
    One person found this helpful
    Report
  • Reviewed in the United States on June 23, 2025
    Blazing fast and works great with my Switch 2. Worth it.
  • Reviewed in the United States on July 9, 2025
    Why did you pick this product vs others?:
    This card works perfectly with the switch 2. I had no problem loading it into the system.
  • Reviewed in the United States on July 8, 2025
    I bought this card for my Switch 2, and I have to say I really like it. It's definitely what I expect from SandDisk. It's only 256GB but that's not anything to sneeze at. I've got several games loaded on it now and it's still going strong. I will probably buy a larger capacity card as soon as they come into stock, but will stick with this brand because I like the quality. It's designed much like a regular mini-sd card, which works well because I can store it easily when it's filled up.

Top reviews from other countries

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  • Marc
    5.0 out of 5 stars Auf der Switch 2 schnell voll
    Reviewed in Germany on July 11, 2025
    Kam schneller als erwartet und leider auch schon wieder voll. Habe sie für die Switch 2 besorgt und ist kompatibel. So wie es angegeben ist.
    Report
  • 匿名希望
    5.0 out of 5 stars 知らなかった
    Reviewed in Japan on July 10, 2025
    Switch2では使える記憶媒体に条件がある事を知らなかったのですが、こちらを購入する事で知りました!なんなくDLもでき良かったです!ありがとうございました!
  • Andrew H
    5.0 out of 5 stars Works like it charm
    Reviewed in Canada on June 14, 2025
    0 issues works with the switch 2 seamlessly perfect 10/10
  • Diego Perri
    5.0 out of 5 stars Acquisto necessario per chi compra in digitale su Switch
    Reviewed in Italy on May 21, 2025
    Premessa: ho acquistato questa SanDisk Express proprio per il mio Nintendo Switch OLED (giacché possiedo parecchi titoli in digitale).

    Qualcuno mi chiederà: perché hai preso questa così costosa quando avresti potuto prenderne una più capiente ma non "Express"?
    Risposta semplice: poiché le SD Express saranno le uniche funzionanti anche su Nintendo Switch 2.
    Tuttavia, siccome conto di rimanere ancora 3-4 anni ancora su Switch 1 e attenderò che esca lo Switch 2 OLED (già rumoreggiato, tra l'altro), ho preferito fare un acquisto del quale posso usufruire sia adesso sia tra 4 anni, senza dover comprare un'altra San Disk.

    Consigliata.
  • H
    5.0 out of 5 stars Good for Nintendo Switch 2
    Reviewed in the United Kingdom on June 27, 2025
    Fast speeds and compatible with my Nintendo Switch 2 with no problems