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Sandisk

SANDISK 512GB microSD Express Card

Based on 2,163 reviews
Condition: New
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$129.99
Save $19.20 was $149.19

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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon
Arrives Wednesday, Oct 28
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At a glance

Condition
New
Capacity
512GB
Model
SDSQXFN-512G-GN4NN
Storage
512 GB
Dimensions
0.04"D x 0.43"W x 0.04"H
Weight
0.26 g
Color
Black
Warranty
Lifetime limited
Works with
Camera, Gaming Console, Personal Computer

Features 5

  • 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].

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. Offload your camera roll in record time and transfer a 2-hour HD movie download in less than 3.5 seconds while using SanDisk PRO-READER SD Express Dual Card [1] (sold separately)—up to 4.4 times faster than our fastest microSD UHS-I cards [9]. Start gaming faster and explore virtual worlds that appear more realistic than ever. On top of saving time, create next-level immersive content with a card that supports faster burst and sustained recording speeds than an SD UHS-II card [2]. With the addition of a PCIe Gen 3-NVMe interface, the microSD Express card represents a massive step forward in the evolution of the microSD format with performance comparable to our basic portable SSD [3]. SanDisk microSD Express cards work with current microSD UHS-I and UHS-II devices, supporting up to 5.3K video [4] and 10MP RAW image capture. SanDisk ThermAdapt helps keep your devices from overheating with a specially designed enclosure and an adaptive thermal controller. SanDisk microSD Express technology readies you—the next generation of creators and explorers—for the future of superspeed devices.

Specs 23

Brand Sandisk
Model Name SDSQXFN-512G-GN4NN
Flash Memory Type Micro SDXC
Memory Storage Capacity 512 GB
Additional Features Drop Proof, Magnetic Proof, Water Proof, Wearout Proof, X Ray Proof
Read Speed 880 MB/s
Media Speed 650
Hardware Connectivity microSDXC

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Oct 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

With over 1GB/s file transfer performance, this card is still the best on the market
Capacity: 256GB
Review Image by Burnt Toast
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. ... show more
Reviewed in the United States on March 15, 2025 by Burnt Toast
Fast, Reliable, and Plenty of Storage
Capacity: 512GB
Great performance and easy to set up. The transfer speeds are fast, and the 512GB capacity provides plenty of space for games, photos, and videos. It’s been reliable so far with no issues. Definitely a great choice if you need a high-capacity microSD card.
Reviewed in the United States on July 6, 2026 by QIYAO
Perfect for the Switch 2
Capacity: 512GB
Works as expected. Compatible with the switch 2. Easy to install.
Reviewed in the United States on August 2, 2026 by Carly S
perfect storage option for the Switch 2
Capacity: 512GB
Bought this for my Nintendo Switch 2 and it works very well. Good value for the price. It reads my games fast and I haven’t had an issue with lag or loading.
Reviewed in the United States on September 1, 2026 by Vivian N.
Great Card BUTTTTT You need to format it to use with other devices
Capacity: 256GB
FORMAT THE CARD and you can use with any other device. I read some review that people had issues with compatibility so I was worried I would be able to use this. But as a content creator I couldn't pass up the $58 for a 258gb card because storage gets expensive. At first, the card didn't work with my any of my cameras and the format option within them was not working... But when I popped this into my computer and used the disk utility repair on the card it worked with all of my devices - iPhone, cameras, etc. So far it seems super fast at recording the large $4k video but I haven't transferred the footage to my computer yet to test the speed getting it onto my hard drive. So far this is a win if you format it! ... show more
Reviewed in the United States on August 31, 2026 by Ash
Good choice for Switch 2
Capacity: 512GB
Works as intended.
Reviewed in the United States on August 3, 2026 by David Polce
It works
Capacity: 512GB
It arrived earlier than expected and it works in my switch 2 so I'm satisfied.
Reviewed in the United States on July 31, 2026 by Omar D.
Memory card for video game use
Capacity: 512GB
Works great in a Nintendo switch 2. Fast delivery and priced better than Nintendo branded cards.
Reviewed in the United States on August 26, 2026 by Louis Smith
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