SanDisk microSD Express Card 512GB
- Memory Storage Capacity: 512 GB
- Flash Memory Type: Micro SDXC
- Hardware Connectivity: microSDXC
- Number of Packs: 1
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
For Switch 2 storage, this card matches the console's own speed standard, though reaching its full rated speed elsewhere needs the right hardware.
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ASIN: B0DTQ35NH6Model: SDSQXFN-512G-GN4NNCategory: MicroSD Cards
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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.
Pros and cons
- 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 |
| Secure Digital Association Speed Class | Class 10 |
| Media Speed | 650 |
| Construction & materials | |
| Color | Black |
| Compatibility & installation | |
| Hardware Connectivity | microSDXC |
| Compatible Devices | Camera, Gaming Console, Personal Computer |
| Included components | |
| Number of Packs | 1 |
| Unit Count | 1 |
| Warranty & support | |
| Warranty Description | Limited lifetime |
| Warranty Type | Lifetime |
| Other details | |
| Flash Memory Type | Micro SDXC |
| Number of Items | 1 |
| Mfr Part Number | SDSQXFN-512G-GN4NN |
Closest rivals on specs
Lexar Blue microSDXC Card 256GB- Memory Storage Capacity 512 vs 256 GB (+100%)
Samsung PRO Endurance microSDXC Card 128GB- Memory Storage Capacity 512 vs 128 GB (+300%)
GIGASTONE 4K microSDXC Card 128GB- Memory Storage Capacity 512 vs 128 GB (+300%)
Frequently asked questions
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.