iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Steam Deck can install games to its built-in drive or to a formatted microSD card. To use a new card, back up its contents, insert it, and choose Steam > Settings > System > Format SD Card. Then create or select the card’s Steam library in Steam > Settings > Storage. For an installed game, open its Library page and use Properties > Installed Files > Move Install Folder to transfer it between configured locations without downloading the game again. If a moved game is shown as uninstalled, add its existing library folder in Storage Manager and use Repair Folder or Verify Integrity of Game Files.
What do you need before installing Steam games to a microSD card?
You need a Steam Deck (LCD or OLED), a microSD card that meets Valve’s compatibility guidance, and enough free space at the destination. Valve says any UHS-I class 3 or better microSD card is supported. UHS-II and UHS-III cards may work, but Steam Deck does not support their higher transfer speeds.
Choose a card described as a UHS-I, U3 (class 3) microSD card for Steam Deck. The compatibility requirement does not establish a particular brand, capacity, price, game-loading result, or endurance rating. Those vary by product and should be checked separately.
Recommended Free Tools
- Back up existing data: Formatting the card erases its contents. Copy photos, documents, recordings, or other files elsewhere before starting.
- Use the correct slot: Insert the card fully into the Steam Deck’s microSD slot before opening the formatting menu.
- Plan your library locations: The internal drive and formatted card can each hold a Steam library, and Steam can manage both from its Storage settings.
- Keep the card available during transfers: Do not remove or eject it while Steam is moving or verifying files.
Valve’s basic storage guidance applies to both Steam Deck LCD and Steam Deck OLED models. Menu wording can change with SteamOS updates, but the documented workflow uses the paths below.
Popular on Amazon
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
What does “UHS-I class 3 or better” mean here?
It is the compatibility specification Valve publishes for Steam Deck microSD storage. UHS-II and UHS-III cards are not automatically unusable, but the Deck does not support the faster transfer modes associated with those ratings. Buying a higher-rated card therefore does not guarantee a corresponding Steam Deck benefit. Keep the requirement focused on the card being a UHS-I, class 3 or better model rather than relying on an unverified brand or performance claim.
How do I format a new microSD card on Steam Deck?
A new card must be formatted by Steam Deck before it can be used for game storage. Valve’s support instruction is explicit: “MicroSD cards will need to be formatted before they can be used with your Steam Deck.” Formatting is destructive, so confirm your backup first.
- Insert the microSD card into the Steam Deck.
- Open Steam.
- Choose Settings.
- Open System.
- Select Format SD Card.
- Read the warning, confirm that the card is the one you intend to erase, and approve the format.
- Wait for Steam Deck to finish. Do not power off the device or remove the card during the operation.
After a successful format, the card should appear as a usable storage location in Steam’s Storage settings. If it does not, restart Steam or the Deck, then check Steam > Settings > Storage before formatting again.
Formatting versus moving: do not confuse these operations
Formatting prepares a card and removes its existing contents. It is required for a new card that has not yet been prepared for Steam Deck storage. Moving an installed game is a separate operation that preserves the installation and changes its library location. If your goal is simply to free internal space, do not format a card that already contains the files you want to keep; configure its existing library and use Move Install Folder instead.
How do I add the microSD card as a Steam library?
Formatting prepares the card, but Steam still needs a library folder there. Storage settings are where you create, select, and manage alternate installation locations.
- Open Steam > Settings > Storage.
- Review the listed internal and removable drives.
- Use the option to add or create a library location on the formatted microSD card.
- When Steam asks for a folder, select the card’s Steam library folder or create one in the card’s storage view.
- Confirm the location so it appears in the Storage list.
Valve describes this as creating an alternate location from the Storage tab. Once the card’s library is listed, it can be selected when installing new games or as the destination for a move.
Why library registration matters
A card can be physically present without its Steam library being registered. Steam’s installer and Move Install Folder command offer destinations they know as Steam libraries, not merely every drive the operating system can see. Register the folder in Storage before troubleshooting an unavailable destination. The same registration step is also the first recovery action when existing game files are present but Steam displays an Install button.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Also popular on Amazon
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
How do I install a new Steam game directly to the microSD card?
Choose the destination during the normal Steam installation process. The game will download and install into the library location you select; there is no separate transfer utility required.
- Open your Library and select the game.
- Choose Install.
- When Steam displays the installation location, open the destination selector.
- Select the Steam library on the microSD card. Select the internal library instead if you want the game on built-in storage.
- Confirm the installation and leave the card inserted until the download and installation finish.
If the card is not offered, return to Steam > Settings > Storage and confirm that it is formatted and that its library folder is listed. A card that is visible to the operating system but absent from Steam’s Storage list is not yet a selectable Steam library location.
Choosing a location for each new install
There is no requirement to put every game in one place. Keep the internal library selected when you want the built-in location, or select the registered microSD library when you want the removable location. The choice is made per installation, and both libraries remain manageable from the same Storage screen. Make sure the selected destination has enough free space before confirming; Steam cannot complete an installation or move if the destination cannot hold the files.
How do I move an installed game between internal storage and microSD?
Use Steam’s built-in Move Install Folder command. This transfers the existing installation between configured Steam libraries, so you do not need to download the entire game again.
Free tools Windows power users keep installed
One-click scans. No signup required.
- Open the game’s page in your Library.
- Open the game’s Properties.
- Select Installed Files.
- Choose Move Install Folder….
- Select the destination library on the internal drive or formatted microSD card.
- Confirm the move.
- Wait for Steam to report completion before launching the game, shutting down, or removing the card.
The command only offers libraries Steam knows about. If the card is missing from the destination list, configure it first in Steam > Settings > Storage. If you are moving from the card to internal storage, make sure the internal library has enough free space for the installed files.
What happens during a move?
Steam relocates the game files from the source library to the selected destination and updates the installation record. The operation is different from uninstalling: the purpose is to preserve the installed files while changing their storage location. The time required depends on the amount of data and the storage devices, but Valve’s documentation does not establish a universal transfer time or performance figure.
Can I move several games?
Repeat the same command for each game, or use the Storage view to manage installations when its selection controls are available. Treat each move as a completed operation: wait for Steam to finish one transfer before removing the card or starting maintenance on the destination.
Also popular on Amazon
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Can I move a game while it is running?
Close the game before starting the move. Keep Steam running normally, leave the card inserted, and avoid shutdowns or interruptions until Steam reports completion. A move is a file operation, not a shortcut that merely changes where Steam looks for the game.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Should I use internal storage or a microSD card?
Both locations can be managed through Steam’s library settings and the same Move Install Folder workflow. The practical difference is convenience versus removable capacity, not a guaranteed game-specific performance result.
| Consideration | Internal storage | microSD card |
|---|---|---|
| Convenience | Always attached; no card handling is required. | Requires the card to remain inserted for games stored there. |
| Removability | Fixed during normal use. | Can be removed or exchanged when Steam is not using it. |
| Compatibility setup | Available as the built-in Steam location. | Must be formatted by Steam Deck and should be UHS-I class 3 or better. |
| Installation workflow | Select its Steam library in Storage or during installation. | Select its formatted Steam library in Storage or during installation. |
| Moving games | Can be the source or destination of Move Install Folder. | Can be the source or destination of Move Install Folder. |
| Main recovery issue | Usually remains registered unless its library path changes. | Steam may need the existing library folder added again after a path or card-recognition problem. |
Internal storage is the simpler option when you do not want to manage removable media. A microSD library is useful when you need another Steam location or want to exchange cards, but it introduces the requirement that the card stay inserted for those games. Neither choice changes the Steam menu workflow: register the library, select it for an installation, or use Move Install Folder for an existing title.
Do not assume that a faster-rated card will produce a corresponding Steam Deck benefit: Valve supports UHS-I class 3 or better and says the higher transfer speeds of UHS-II and UHS-III are not supported.
Why does Steam say a moved game is uninstalled?
Steam can lose track of an existing installation when the library folder is not registered, the card was removed, or the storage path changed. The files may still be present; first reconnect the card and add the existing library folder instead of downloading immediately.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
- Insert the microSD card and wait for Steam Deck to recognize it.
- Open Steam > Settings > Storage to open Storage Manager.
- Use the plus (+) button to add a library folder.
- Browse to the existing Steam library folder on the microSD card or internal drive.
- Confirm the folder and allow Steam to rescan it.
- Return to the Library and check whether the game is listed as installed.
Valve’s support guidance says adding the existing library folder can make installed games appear again. Do not delete the folder before trying this recovery; doing so removes the files Steam may be able to reuse.
What if the folder is present but the game still is not recognized?
Confirm that you added the library folder itself, not an unrelated parent folder, and that the correct card or drive is connected. If Steam identifies a library problem, use Repair Folder. Once the game appears in the Library, use Verify Integrity of Game Files if individual files may be missing or damaged.
Also popular on Amazon
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Widely Compatible: Transform any USB-C port into a USB-A port and USB-A port into a USB-C port, and connect up a wide range of USB-C(including MacBook, iPad Pro/Air/Mini, iPhone models with USB C ports, Samsung Galaxy series, and Google Pixel series. ) and USB A devices(including external hard drives, phones, mice, printers, and more)
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
How do I repair a library or verify a game’s files?
Use Repair Folder when Steam has trouble with the library itself, and use Verify Integrity of Game Files when a particular installation may contain missing or corrupted files.
Repair the library folder
- Open Steam > Settings > Storage.
- Select the affected drive or library.
- Open its options menu.
- Choose Repair Folder and let Steam complete the repair.
Repair Folder addresses the library location. It is the appropriate next step when the folder is present but Steam reports a path or library problem.
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 & 11Verify one game
- Open the game in your Library.
- Open Properties.
- Select Installed Files.
- Choose Verify Integrity of Game Files.
- Wait for Steam to compare the local installation and reacquire files it identifies as missing or damaged.
Verification is separate from moving. Run it after Steam recognizes the library and the game, not as a substitute for adding a missing library folder.
What should I do when the card or library is not shown?
- The card is not listed in Storage: Confirm it is fully inserted, restart Steam, and check again. If it is a new card, use Steam > Settings > System > Format SD Card; remember that formatting erases its contents.
- The card is listed but has no selectable library: Add or create a library folder from Steam > Settings > Storage, then retry the installation or move.
- A game shows an Install button even though files are present: Use Storage Manager’s plus button to add the existing library folder and let Steam rescan it.
- Steam reports a folder problem: Select Repair Folder in Storage Manager.
- The game launches poorly or files are suspect: Use Properties > Installed Files > Verify Integrity of Game Files.
- The move appears stuck: Keep the Deck powered and the card inserted until Steam completes the operation. Interrupting a transfer can leave the library needing a repair or verification pass.
- You want to swap cards: Close any game using the card and let Steam finish downloads, moves, or verification before removing it. Re-add the library folder if Steam does not automatically recognize it when the card is inserted again.
What not to do during recovery
Do not format first just because Steam shows an Install button. Formatting can erase the existing installation and other files. Do not remove the card while Steam is scanning, repairing, verifying, downloading, or moving. Reconnect the storage, register the library, repair the folder, and verify the game in that order as needed.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is the safest workflow for moving games regularly?
Use a repeatable sequence so Steam always has a valid library record and the card is not removed during file operations.
- Check the destination in Steam > Settings > Storage before starting.
- For a new card, back up its contents and format it from Settings > System > Format SD Card.
- Add or confirm the card’s Steam library folder.
- For a new title, select that library during installation.
- For an existing title, use Properties > Installed Files > Move Install Folder.
- Wait for completion and launch the game once Steam shows it as installed.
- If it appears uninstalled, add the existing library folder, then use Repair Folder or Verify Integrity of Game Files as appropriate.
This workflow keeps formatting, library registration, file movement, and recovery as separate operations. That distinction prevents the common mistake of formatting a card when the goal was only to move an already-installed game.
Frequently Asked Questions
Can I install Steam games to a microSD card without formatting it?
No. Valve requires a microSD card to be formatted before Steam Deck can use it for game storage. Copy any existing files elsewhere first because the format erases the card.
Also popular on Amazon
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Will moving a game to an SD card make me download it again?
No, Move Install Folder is designed to relocate the existing installation between Steam library locations. A new download is generally only needed if files are missing or verification finds that they must be reacquired.
Can I use a UHS-II or UHS-III card in Steam Deck?
Valve says those cards are expected to work, but Steam Deck does not support their higher transfer speeds. Valve’s supported specification is any UHS-I class 3 or better microSD card.
Do I need a separate transfer utility to move games?
No. Steam includes the Move Install Folder command under the game’s Properties and Installed Files menus. Configure both library locations in Storage, then select the destination there.
Why is my microSD card visible but unavailable during installation?
The card may be formatted but lack a registered Steam library. Open Steam > Settings > Storage and add or create a library folder on the card, then return to the installation screen.
What should I do before removing a Steam Deck SD card?
Finish downloads, moves, repairs, and file verification, close any game stored on the card, and shut down or otherwise ensure Steam is no longer using the library. If the library is not recognized after reinserting the card, add its existing folder in Storage Manager.
Should I format a card that already contains my Steam games?
Not if your goal is only to change where the games are stored. Formatting erases the card. Add the existing library folder in Storage Manager and use Move Install Folder or recovery tools instead.
Does Steam Deck OLED use a different storage process?
No. Valve’s basic storage guidance applies to both Steam Deck LCD and Steam Deck OLED models, including formatting the card, registering a library, installing to it, and moving games between libraries.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsThe Bottom Line
Format a new card only after backing it up, use a UHS-I class 3 or better model, register its library in Steam > Settings > Storage, and move existing games through Properties > Installed Files > Move Install Folder. If Steam loses track of a moved game, add the existing library folder before downloading again.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
