Best MicroSD Cards for Steam Deck

The Steam Deck’s internal storage fills up fast. A 512GB model sounds generous until you install a few modern PC games. A good microSD card fixes that problem cheaply, and the Deck reads from its card slot natively with no extra configuration.

Here are the best microSD cards for the Steam Deck in 2026, picked for speed, reliability, and value.

What Speed Do You Actually Need?

The Steam Deck’s card slot is UHS-I, which caps sequential reads around 100MB/s regardless of what the card claims on the box. A card rated at 200MB/s will not read faster than one rated at 100MB/s on the Deck.

What matters most is A2 Application Performance Class certification. A2 cards handle the small random reads that games rely on during loading screens. An A1 card will work, but an A2 card loads games noticeably faster in practice.

Best Overall: Samsung Pro Plus

The Samsung Pro Plus hits A2 speeds, handles real-world random reads well, and comes with a 10-year limited warranty. Samsung’s reliability record across millions of cards is excellent.

The 512GB version runs around $45. For most Steam Deck owners, this is the pick.

Check Samsung Pro Plus on Amazon

Best Budget: SanDisk Extreme

The SanDisk Extreme costs less than the Samsung and still hits A2 performance. In real use on the Deck, load times are nearly identical to the Samsung Pro Plus.

If you want to save $10 and do not need Samsung’s warranty, the SanDisk Extreme is the call.

Check SanDisk Extreme on Amazon

Best Large Capacity: Lexar Play 1TB

The Lexar Play 1TB runs around $70 to $80, is A2 rated, and handles the Deck’s card slot without issues. Games load a few seconds slower than on the Samsung in back-to-back tests, but the gap is minor. For double the storage at a modest premium, it is worth it.

Check Lexar Play 1TB on Amazon

Best Premium: Angelbird AV PRO

Angelbird makes cards for professional video work. The AV PRO handles sustained write speeds better than consumer cards under heat, which helps if you record gameplay or run write-heavy apps. For most gamers, this is overkill. If you want the most reliable card available regardless of price, this is it.

Check Angelbird AV PRO on Amazon

What Size Should You Get?

256GB works if you rotate games and keep around 20 to 30 installed at once. 512GB lets you keep 50 to 100 games depending on their size. 1TB is for people who want everything available without thinking about storage management.

Modern AAA games run 50 to 100GB each. Indie titles average 2 to 10GB. If you mostly play indie games, 256GB is fine. If you play AAA games, go 512GB at minimum.

How to Set Up Your Card

Insert the microSD into the slot on the Deck’s bottom edge. Open Steam, go to Settings, then Storage. Set the card as your default installation drive. Format it to ext4 when prompted. That enables the Linux file system and gives better performance than FAT32 or exFAT.

Games on the card run identically to games on internal storage. The only difference is the marginal speed gap between the card and the SSD.

Does Brand Matter?

Yes. Stick to Samsung, SanDisk, Lexar, or Kingston. Off-brand cards from unknown sellers often fail early, report false storage capacities, and corrupt saves. The price difference between a known brand and a no-name card is $5 to $10. That is not a trade worth making.

Quick Picks

• Best overall: Samsung Pro Plus 512GB
• Best budget: SanDisk Extreme 512GB
• Best large capacity: Lexar Play 1TB
• Best premium: Angelbird AV PRO

Also see: Steam Deck SSD Upgrade Guide if you want to replace the internal drive instead.