# SanDisk microSD Express 512GB — Nintendo Switch 2

Source: https://www.ranked10.co.uk/tech/best-512gb-microsd-cards/sandisk-microsd-express-512gb
Ranked #6 in "Best 512GB MicroSD Card 2026: 10 Ranked, and Why Read Speed Misleads": https://www.ranked10.co.uk/tech/best-512gb-microsd-cards

- Price: £120.96 (checked on Amazon UK on 2026-09-15)
- Amazon rating: 4.6 from 2,165 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0DTQ35NH6?tag=ranked10-21

The SanDisk microSD Express Card 512GB is number six in our guide, and it is the odd one out. Every other card in the list is a UHS-I microSD, while this one carries a PCIe-NVMe interface and a read figure of 880 MB/s — roughly four times the 190–200 MB/s the two cards at the top of our list advertise. It is also the most expensive card we cover at £120.96, and its 2,165 Amazon ratings average 4.6 out of 5.

The catch sits in SanDisk's own bullet points. Its fastest claim — 60 minutes of 4K UHD video at 30fps transferred in less than 70 seconds, and 1,000 10MP RAW photos in 51.7 seconds — comes with the condition "when paired with SANDISK PRO-READER SD Express Dual Card (sold separately)". The headline number is therefore measured through a reader you buy on top of the card, not through the card on its own. The same listing also disagrees with itself on speed class: the spec table states "Secure Digital Association Speed Class: Class 10", while the Item Highlight on the same page claims "U3, C10", and the spec table separately lists a "Media Speed" of 4x. Everything on this page comes from the Amazon listing, not from our own testing.

## Specification

| Field | Value |
|---|---|
| Price | £120.96 |
| Customer rating | 4.6 out of 5, from 2,165 ratings |
| Capacity | 512 GB |
| Advertised read speed | 880 MB/s |
| Write speed (Item Highlight) | Up to 650 MB/s, with up to 220 MB/s sustained write |
| Speed class (as listed) | Spec table says Class 10; Item Highlight claims U3, C10 |
| Media Speed (as listed) | 4x |
| Interface and fallback | microSD Express with PCIe-NVMe; performs at UHS-I speeds in microSD UHS-I and UHS-II devices |

## Questions people ask

**Does the SanDisk microSD Express Card 512GB work in a Nintendo Switch 2?**

The first bullet states "NEXT GEN GAMING: Works with Nintendo Switch 2."

**How fast does SanDisk say the 512GB Express card is?**

The spec table lists a Read Speed of 880 MB/s, and the Item Highlight lists up to 650MB/s write speeds with up to 220MB/s sustained write speeds.

**Can I get 880 MB/s from the card on its own?**

SanDisk's own bullet says the 60 minutes of 4K UHD video transfers in just less than 70 seconds "when paired with SANDISK PRO-READER SD Express Dual Card (sold separately)" — the reader is not included with the card.

**What happens if I put it in a UHS-I device?**

The second bullet says the card "performs at UHS-I speeds when used with microSD UHS-I and UHS-II devices", so the Express speed only applies with Express hardware.

**What speed class does the listing give for this SanDisk card?**

The spec table lists "Secure Digital Association Speed Class: Class 10", while the Item Highlight on the same page claims "U3, C10" — the two do not match.

**How durable is the SanDisk microSD Express Card 512GB?**

The listing says the cards are waterproof, temperature-proof, humidity-proof, drop-proof, shock-proof, magnetic-proof, x-ray proof and wear-out proof, and the warranty type is listed as Lifetime.