SANDISK 512GB microSD Express Card
- MicroSD Card
- 512 GB
- Micro SDXC
- Lifetime
For Switch 2 storage, this card matches the console's own speed standard, though reaching its full rated speed elsewhere needs the right hardware.
As an Amazon Associate, ProductDome may earn a commission from qualifying purchases made through links on this page.
Sizes Available
Need a different one? Pick on Amazon →
How it ranks among the 19 microsd cards we track
4.7★ across 2,100 Amazon ratings, Bayesian-smoothed toward the category average.
2,100 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
2,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 19 microsd cards we track - how the scorecard works · full microsd cards data report. Confidence: high - strong rating volume and complete data.Updated 8 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
SanDisk built this 512GB card around the newer microSD Express interface, rated for Nintendo Switch 2 and for speeds well beyond standard UHS-I cards while still fitting standard microSD slots.
The headline speeds depend on a device or reader that actually supports the Express/PCIe interface, such as Switch 2 or SanDisk's own PRO-READER SD Express Dual Card, sold separately. In an older UHS-I microSD slot, the card will still work but won't reach anywhere near those top numbers.
- 512GB microSD Express card
- Up to 880MB/s read, 650MB/s write
- Built for Nintendo Switch 2
- ThermAdapt heat management
Who it's for
A fit for Switch 2 owners who want a large card matching the console's new speed standard, or anyone future-proofing for PCIe-based microSD readers. Less of a reason to buy for someone with only older UHS-I devices, where the card runs at standard speeds regardless of its rating.
Strengths and trade-offs
Drawn from this product's published specifications.
- Built specifically for Nintendo Switch 2 speeds
- Up to 880MB/s read and 650MB/s write with compatible hardware
- Backward compatible with UHS-I and UHS-II slots
- Rated waterproof, shockproof and temperature resistant
- Top speeds require a PCIe/NVMe-capable device or reader
- In an older UHS-I slot, speeds fall back to standard levels
Performance notes
The card uses a PCIe-NVMe interface rather than the older UHS bus, which is what enables the 880MB/s read and 650MB/s write ratings, but only when paired with a host that speaks that interface, like Switch 2. SanDisk's ThermAdapt enclosure is built to manage heat at those higher transfer speeds, and the card also carries the brand's usual waterproof and shock-resistant ratings.
Specifications
| Brand | Sandisk |
|---|---|
| Model | SDSQXFN-512G-GN4NN |
| Dimensions & fit | |
| Item Dimensions L x W | 0.6 × 0.4 inches |
| Item Dimensions D x W x H | 0 × 0.4 × 0 inches |
| Capacity & performance | |
| Memory Storage Capacity | 512 GB |
| Media Speed | 650 |
| Read Speed | 880 megabytes_per_second |
| Secure Digital Association Speed Class | Class 10 |
| Construction & materials | |
| Color | Black |
| Compatibility & installation | |
| Compatible Devices | Camera, Gaming Console, Personal Computer |
| Hardware Connectivity | microSDXC |
| Included components | |
| Unit Count | 1 |
| Number of Packs | 1 |
| Warranty & support | |
| Warranty Type | Lifetime |
| Warranty Description | Limited lifetime |
| Other details | |
| Flash Memory Type | Micro SDXC |
| Number of Items | 1 |
| Item Highlight | Works with Nintendo-Switch 2, Up to 880MB/s Read Speeds, Up to 650MB/s Write Speeds, U3, C10 - SDSQXFN-512G-GN4NN |
| Mfr Part Number | SDSQXFN-512G-GN4NN |
| Additional Features | Drop Proof, Magnetic Proof, Water Proof, Wearout Proof, X Ray Proof |
Other Sandisk microsd cards
How it compares
This product against the closest alternatives we track in microsd cards.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| SANDISK 512GB microSD Express CardThis product | 4.7 / 5 | 2,100 | 4.6 / 5 |
| SanDisk 128GB Extreme microSD UHS I Card for 4K Video on SmartphonesSanDisk | 4.8 / 5 | 15,300 | 4.8 / 5 |
| Patriot 64GB Micro SD V30 A1 Memory CardPatriot Memory | 4.5 / 5 | 12,900 | 4.7 / 5 |
| Samsung PRO Endurance 128GB microSDXC Memory Card with AdapterSamsung | 4.7 / 5 | 9,600 | 4.7 / 5 |
| Amazon Basics microSDXC Memory Card with Full Size AdapterAmazon Basics | 4.7 / 5 | 97,500 | 4.6 / 5 |
Similar microsd cards from other brands
Questions about the Sandisk SDSQXFN-512G-GN4NN
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Will the SanDisk SDSQXFN-512G-GN4NN reach 880MB/s in any microSD slot?
No, those speeds need a PCIe/NVMe-capable device or reader, such as Nintendo Switch 2 or SanDisk's PRO-READER SD Express Dual Card.
Is this SanDisk card compatible with older microSD slots?
Yes, it works in standard UHS-I and UHS-II slots, but only at their slower speeds, not the Express rating.
What is this SanDisk 512GB card designed for?
It's built for Nintendo Switch 2 and other devices that support the newer microSD Express (PCIe-NVMe) interface.