Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchPC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Yes. Every Steam Deck model listed in Valve’s specifications has a high-speed microSD card slot, so you can add storage without opening the console. Valve supports UHS-I microSD cards rated Class 3 or better. For a larger internal upgrade, the SSD can also be replaced, but that requires opening the Deck.
How to expand Steam Deck storage with a microSD card
A microSD card is the simplest and most reversible way to add room for games. Valve’s technical specifications list a high-speed microSD slot across the Steam Deck models shown and specify UHS-I support for SD, SDXC and SDHC cards.
Choose a compatible card
Valve says any UHS-I microSD card rated Class 3 or better is supported, according to Steam Support. A UHS-I U3 microSDXC card is a suitable choice for adding game storage. A faster UHS-II or UHS-III card will work at the Deck’s supported UHS-I bus speed; it will not deliver the higher bus speeds those standards can provide in compatible devices.
Valve’s launch-era user booklet describes the option of adding up to 2 TB through a microSD card. Treat that as Valve’s published capacity guidance, not a separately tested maximum. The hardware specification confirms SD, SDXC and SDHC support.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errors#1 Best Overall
- Compatible with Nintendo-Switch 1 (NOT Nintendo-Switch 2), smartphones, and tablets
- Boost your gaming experience with up to 160MB/s read for fast load times
- A2-rated app performance lets you quickly access and enjoy games and apps without lag for an enhanced gaming experience and a competitive edge
- Store more of your favorite games and other content with capacities up to 2TB
- Built to endure with temperature resistance, waterproofing, x-ray protection, and more
Format the card in SteamOS
Back up any files you want to keep before formatting: the process erases the card. Valve’s instructions are:
- Insert the microSD card into the slot on the bottom of the Steam Deck.
- Open Steam > Settings > System > Format SD card.
- Confirm formatting, then wait for SteamOS to prepare the card for use.
After formatting, the card is available as storage for installing games. The menu path is from Valve Steam Support.
Rank #2
- Compatible with Nintendo-Switch 1 (NOT compatible with Nintendo-Switch 2), smartphones, and tablets
- Boost your gaming experience with up to 160MB/s read for fast load times
- A2-rated app performance lets you quickly access and enjoy games and apps without lag for an enhanced gaming experience and a competitive edge
- Store more of your favorite games and other content with capacities up to 2TB
- Built to endure with temperature resistance, waterproofing, x-ray protection, and more
MicroSD card or internal SSD replacement?
Both add capacity, but they differ in effort, portability and risk. A microSD card is easy to install and remove; replacing the SSD means opening the chassis and handling internal components.
| Factor | microSD expansion | Internal SSD replacement |
|---|---|---|
| Installation | Insert the card and format it in SteamOS. | Requires opening the Deck and following a model-specific repair guide. |
| Cost | Depends on the card; no fixed price is established here. | Depends on the replacement SSD and tools; no fixed price is established here. |
| Portability | Removable and easy to move between compatible devices. | Installed internally; moving it requires opening the Deck again. |
| Game-load performance | Uses the Deck’s UHS-I microSD interface; performance varies by card and game. | Uses internal SSD storage; performance depends on the replacement drive. No comparative benchmark is stated here. |
| Risk and effort | Low: no chassis opening is needed. | Higher: opening the chassis and careful handling are required. |
Can you upgrade the Steam Deck SSD?
Yes. iFixit provides separate replacement guides for the LCD model and the OLED model. The guides are model-specific, so use the one that matches your Deck and follow its complete instructions rather than treating the swap as a simple plug-in upgrade.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Rank #3
- Note: NOT compatible with Switch2 Please note that this product is not a microSD Express card and is not compatible with Switch2 for game storage or save data. If used in the Switch2, it may only support limited functions such as storing screenshots or videos, but will not allow game installation or save file access.
- Designed for dependable storage on portable gaming consoles
- Steam Deck users: For optimal gaming performance, including the ability to store and load video games, we suggest using a Gen4x4 2230 SSD.
- 5-year limited manufacturer warranty
- SmartPhones: S20, S20+, S20 ultra 5G, S10 lite, S10, S10+ A22, A22 5G, A52 5G, A32 5G, A52, A72, A32, A02s, A12, A21, A71 5G, A51 5G, A20s, Note 10+, J4 Core, J8, J7 Star, J7, Note 10 Plus. SAMSUNG TABLETS: Tab S7 FE 5G, Tab S7 FE, Tab A7 Lite, Tab A7 10.4 (2020), Tab Active 3, Tab S7, Tab S7+, Tab S6 Lite, Tab S6, Tab A 8.0 (2017), Book S and 10th Generation Fire Tablets.
Remove any microSD card before opening the device; leaving one inserted can damage it during disassembly. An SSD replacement also requires tools and careful handling. You may need to repair or re-image SteamOS afterward; the OLED guide points to Valve’s recovery instructions.
Quick Recap
Best Value
- CAPTURE LARGER THAN LIFE. Unlock startling 5K[3] point-of-view and pristine high-res stills with video speed class ratings of U3 and V30[4].
- SPEED BARRIERS SHATTERED. Save precious moments with rapid read speeds up to 245MB/s[2] and write speeds up to 170MB/s[2] [256GB-1TB capacities[1]].
- MAXIMIZE WITH MASSIVE CAPACITY. Record longer and store more with up to 2TB[1] of storage.
- DURABILITY YOU CAN COUNT ON. SANDISK microSD cards are temperature proof, humidity proof, waterproof, shock proof, drop proof, magnet proof, X-ray proof and wear-out proof[7].
- EASY CONTENT MANAGEMENT. Easily back up, organize, and transfer your photos and videos with the SANDISK Memory Zone desktop or Android mobile app[10].
Rank #4
- EXPAND YOUR STORAGE. Insert your card to add massive storage up to 1.5TB[1] to your Android smartphones and tablets, digital cameras, and laptops.
- SPACE FOR MORE. With expansive capacities up to 1.5TB[1], capture and store hours of Full HD video[4], movies, music, games, photos, and podcasts.
- MOVE FILES FAST. Use your card with the SANDISK QuickFlow microSD UHS-I Card USB-A Reader[6] to achieve up to 195MB/s[2] read speeds [128GB-1.5TB models] and offload your content fast.
- LOAD APPS IN A SNAP. Rated A1[3], the SANDISK Ultra microSD card is optimized for faster app launch and overall app performance.
- EASY CONTENT MANAGEMENT. Easily back up, organize, and transfer your photos and videos with the SANDISK Memory Zone desktop or Android mobile app[5].
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