The best microSD cards for Steam Deck have been heavily discounted in the Amazon Prime Day sales

Need more room for your game library? These Steam Deck-ready microSD card Amazon Prime Day 2025 deals bring serious speed, capacity, and reliability without wrecking your wallet. From our favorite Micro SD card for Steam Deck Samsung Sonic editions to rugged all-rounders from Lexar, SanDisk, and Gigastone, each card here is a beast. Don’t forget about grabbing that 30 day free Amazon Prime trial to make sure you’re getting the best discounts and fastest delivery.

This 1TB Sonic Edition microSD from Samsung is our top pick for Steam Deck, which matches the same specs as the standard edition. With blazing read/write speeds up to 180MB/s and 130MB/s, it’s built for rapid game loading and smooth 4K recording. It’s got A2, U3, and V30 ratings for apps and video, plus rugged protection against water, X-rays, and drops. If you want storage that stands out and performs, this one ticks every box.

The 512GB version of Samsung’s Sonic PRO Plus card hits a perfect balance for most Steam Deck users. It’s got the same speedy 180MB/s read performance, 6-proof durability, and a full SD adapter in the box. This card handles everything from high-speed game installs to 4K media recording—and looks sharp doing it. Great value, great branding, and no compromise on quality.

Lexar’s 1TB PLAY card is built with gamers in mind. It’s A2-rated, meaning game and app launches stay quick, and the up to 160MB/s read speeds mean you’ll spend less time waiting on load screens. It’s great for big libraries and perfect for handhelds like the Steam Deck where internal storage can run dry fast. For anyone looking to expand without compromise, this is a high-capacity card at a sweet discount.

Gigastone’s 512GB Gaming Plus card is built for reliable performance on handheld consoles like the Steam Deck. It offers up to 100MB/s read speeds and supports 4K video, with an A1 app performance rating that helps games and apps run smoother. It’s also waterproof, shockproof, and heat-resistant, making it perfect for travel or daily carry. If you’re looking for a card that’s rugged and fast without overspending, this is a smart choice.

The 256GB SanDisk MAX Endurance card is perfect for long-term, reliable storage. Originally designed for security cams and dash cams, it’s engineered for extreme durability—up to 120,000 hours of use. That resilience makes it ideal for Steam Deck users who want peace of mind. It supports Full HD and 4K video, and includes U3, V30, and Class 10 ratings for solid read/write performance. It’s a dependable option if you’re looking for lasting value in a mid-size capacity.

If you want one card to store everything, the Lexar PLAY BLUE 2TB is tough to beat. It’s A2-rated for fast app launches and has up to 160MB/s read speeds to keep big games and large files moving fast. This is a card that’s built for gaming, video, and multitasking on the Steam Deck or any Android device. Plus, it includes rugged features like waterproofing and x-ray protection. It’s pricey, but the capacity and performance speak for themselves.

This 512GB Lexar PLAY card hits a sweet spot for Steam Deck owners. It’s large enough to hold a hefty library of indie games or a mix of AAA titles, while still staying fast thanks to A2 app performance rating. The card reads up to 160MB/s too, so even loading times stay snappy. Great for users who want breathing room without going all-in on a 1TB option.

PNY’s 2-pack of 256GB cards is all about flexibility. Use one for games, and keep the other loaded with media or backups. Both cards hit solid read/write speeds and come with adapters, making them easy to switch between your Steam Deck, camera, or other devices. If you’re managing multiple setups or just like having a backup, this is a great way to stretch your storage across your devices.

Need max capacity? The SanDisk Ultra 1.5TB is for gamers who’d rather install now and never worry later. It’s not the fastest on this list, but it’s plenty for casual loading and storing massive libraries of games, media, and more. If you’re someone who hates juggling files or relies on offline access, this one gives you breathing room for days.

This 256GB Sonic Edition card from Samsung is ideal for anyone building out a Steam Deck library on a budget. It’s fast, durable, and has that fun Sonic branding without tacking on much cost. Performance-wise, it’s quick enough for most games and a great starter option for those new to handheld PC gaming.

The SanDisk 2TB Extreme is the go-to for creators and power users. With read speeds up to 240MB/s and durable construction, it’s designed for performance and reliability. Whether you’re running large installs, video content, or a mixed library of games and media, this card handles it all without breaking a sweat.