Best SD Cards For Nintendo Switch
Expert recommendations based on Steam Deck specifications
Recommended Spec
microSD UHS-I (not UHS-II) (A1 or faster)
SteamOS runs from the internal SSD, and the microSD slot holds your game library. Buy for capacity first, then pick an A2 card for faster game loads.
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#1 Top Pick for Steam Deck
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Official Steam Deck SD Card Requirements
-
Format: microSD UHS-I (not UHS-II)
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Minimum Speed: A1
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App Performance: A2 (recommended) (Required for OS/Apps)
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Maximum Capacity: Up to 2TB
Why these requirements? The Steam Deck's microSD slot is UHS-I, so cards top out around 100 MB/s no matter what the label says. Games load from the card in small random reads, which is what the A1 and A2 app ratings measure. 2TB cards such as the SanDisk Extreme and Lexar Play work. microSD prices rose across all capacities in 2026 because of a NAND flash shortage.
Detailed Specifications
Type
microSD UHS-I (not UHS-II)
Min Speed Class
A1
Write Speed
undefined
Recommended Size
256GB, 512GB
Max Capacity
2TB (2TB tested)
Top SD Card Recommendations
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| SD Card | Verified | Speed Class | Write Speed | Pros | Price |
|---|---|---|---|---|---|
Kingston Canvas Go! Plus microSD
|
V30 | Up to 90 MB/s |
|
$ Check Price | |
ADATA Premier Pro microSD
|
V30 | Up to 80 MB/s |
|
$ Check Price | |
SanDisk Ultra microSD
Full Review
|
V10 | Up to 20 MB/s |
|
$ Check Price |
Compare These Cards
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Kingston Canvas Go! Plus microSD
$ · Mid-Range- UHS RatingUHS-I
- Speed ClassV30
- App PerformanceA2
- Read SpeedUp to 170 MB/s
- Write SpeedUp to 90 MB/s
- EnduranceStandard
Available Capacities64GB, 128GB, 256GB, 512GB
Pros
- V30 and A2 with 90 MB/s writes. Often bundled with a USB reader.
Cons
- Less common in retail stores than SanDisk.
recommended
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ADATA Premier Pro microSD
$ · Mid-Range- UHS RatingUHS-I
- Speed ClassV30
- App PerformanceA2
- Read SpeedUp to 100 MB/s
- Write SpeedUp to 80 MB/s
- EnduranceStandard
Available Capacities64GB, 128GB, 256GB, 512GB
Pros
- V30 and A2 at a low price.
Cons
- Harder to find than SanDisk and Samsung.
budget
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SanDisk Ultra microSD
$ · Budget- UHS RatingUHS-I
- Speed ClassV10
- App PerformanceA1
- Read SpeedUp to 195 MB/s
- Write SpeedUp to 20 MB/s
- EnduranceStandard
Available Capacities32GB, 64GB, 128GB, 256GB, 512GB, 1024GB, 1500GB
Pros
- Cheap and sold in large capacities up to 1.5TB.
Cons
- Not V30 rated. Too slow for most 4K video.
SanDisk Ultra microSD
The SanDisk Ultra microSD is a high-volume budget pick offering read speeds up to 195 MB/s for quick transfers and app loading. Its lighter write performance and V10 rating make it better suited to photos and everyday storage than sustained 4K video.
Target User:
Budget-conscious smartphone and tablet users who want fast file transfers without 4K video demands
Best For:
Smartphones & Tablets, Dash Cams, Drones
Upgrade to the SanDisk Extreme microSD if you need V30-rated write speeds for 4K video; stick with the Ultra for photos and casual use where price is the priority.
Featured Products on Amazon
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Kingston Canvas Go Plus 128GB microSD Card | Up to 200MB/s | Class 10, UHS-I, U3, V30, A2 | SDCG4/128GB
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Kingston 128GB Canvas Select Plus microSD Card | Up to 150MB/s | Class 10, UHS-I, U1, V10, A1 | SDCS3/128GB
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Frequently Asked Questions
What SD Card Do I Need for Steam Deck?
The Steam Deck takes a microSD UHS-I (not UHS-II) card rated A1 or faster. 256GB or 512GB covers most owners, and the maximum is 2TB. Buy SanDisk, Lexar, Samsung or Kingston from a reputable seller: counterfeit cards are the most common cause of lost files.
Can I use fast V60 cards?
Yes, but they won't load games any faster. The Steam Deck's UHS-I slot caps reads near 100 MB/s, so a V60 or UHS-II card performs like a good A2 UHS-I card.
What is the max SD card size for Steam Deck?
2TB, the microSDXC limit. 2TB cards from SanDisk and Lexar work in both the LCD and OLED models.
Does the Steam Deck OLED use a different microSD card?
No. The OLED model has the same UHS-I microSD slot as the LCD model, so the same cards work in both.
Is A1 required for Steam Deck?
Yes. A1 is the minimum that keeps the Steam Deck free of slow loads, stutter, or write errors. For load times, the A2 (recommended) app rating matters more.
What size SD card should I get for Steam Deck?
256GB covers light use; 512GB suits heavy use. The maximum is 2TB (2TB confirmed working).
Can I use older or slower cards with Steam Deck?
Not below A1. Slower cards cause slow loads, stutter, or write errors. Check the card label for the A1 mark.
Is a UHS-II card faster in Steam Deck?
No. The Steam Deck has a UHS-I slot, so a UHS-II card runs at UHS-I speed. It only offloads faster in a UHS-II card reader.
Does the brand matter for Steam Deck?
Yes. SanDisk, Lexar, Samsung and Kingston cards meet their rated speeds. Buy from the brand's store or a major retailer: counterfeit cards sold under those names are common on marketplaces.
What happens if I use the wrong card with Steam Deck?
A card slower than A1 causes slow loads, stutter, or write errors. A card over the maximum capacity or in the wrong format may not be recognized.
How long will an SD card last in Steam Deck?
Several years in normal use. Cards usually fail from wear or counterfeit flash, not age. Replace yours at the first write error, corrupted file or "card not recognized" message.