Source review: October 11, 2026. Menu labels, project releases and supported configurations can change; consult the linked documentation for your installed version.
Choose the smallest change that solves the problem
Use Steam storage management to check which drive contains each game and how much free space remains. A full internal drive can still matter when large games live on microSD because additional application data, shader data and compatibility environments may use internal storage. Moving a library entry is different from moving every associated save or desktop configuration. Before purchasing hardware, identify whether the shortage comes from installed games, downloaded installers, recordings, emulator data or several copies of the same files.
Prepare and test a microSD card
Valve provides a format option in the SteamOS system settings. Formatting erases the selected card, so copy its existing files elsewhere and check its identity before proceeding. The Deck supports UHS-I microSD operation; a faster bus rating on a card does not make the reader operate at that higher bus speed. Start by installing one small game, launching it, saving and restarting. If this fails, diagnose the card and filesystem before migrating a large library. A capacity label is not proof that a card reliably stores that amount of data.
Keep saves separate from reinstallable content
Game downloads are often replaceable; locally stored saves, screenshots, controller configurations and non-Steam application data may not be. List those before altering a drive. Confirm actual cloud synchronization for the relevant account instead of treating the Steam Cloud icon as a backup of the entire computer. For desktop applications, check their documented data directories and Flatpak storage separately. Copy important files to a second physical device and open representative copies there. A file list without readable data is not a verified backup.
Plan an internal drive replacement
Internal SSD work is a hardware repair with a software recovery stage. Read the complete LCD or OLED procedure before opening the case, including the battery precautions and correct drive specifications. Remove the microSD card before separating the enclosure to avoid breaking it. Photograph the original drive, shielding and screw arrangement, and retain the original drive intact until the replacement boots and your data is verified. Do not adapt a longer desktop drive or move shielding by guesswork; mechanical fit, electrical compatibility and proper reassembly all matter.
Verify the completed upgrade
After installing a supported drive, use the appropriate documented recovery or restoration method and check that SteamOS sees the expected capacity. Restore a small sample of data first and launch games from both internal storage and microSD. Check suspend, charging and controls before filling the drive with downloads. Keep the previous hardware and backup for a while so a problem discovered later remains recoverable. If the replacement is missing from firmware or recovery tools, stop reinstalling software repeatedly and revisit the hardware connection and part compatibility.
Sources and project documentation
- Valve: storage management and microSD formatting
- iFixit: Steam Deck LCD repair procedures
- iFixit: Steam Deck OLED repair procedures
Continue with the related guide or return to the Steam Deck directory.