Where Things Live

On the device

/opt/muos/configPersistent system and frontend settings.

/opt/muos/share/info/contentFolder and content core assignments.

/opt/muos/share/info/configRetroArch global, core, folder and content configuration.

/opt/muos/shareBundled manifests, assets, web files and other shared resources.

/run/muosTemporary state shared by the frontend, services and launch process.

On your card

MUOS/biosSystem BIOS files.

MUOS/info/manifestAn optional core.json of your own, plus the generated assignment index.

MUOS/info/nameFriendly folder names, game name lookups and tags.

MUOS/info/launchThe file each folder launches, set with Set Launch File in Explore Content.

MUOS/info/catalogueArtwork, including animated box and preview media, descriptions, manuals and catalogue configuration.

MUOS/picklesPickles save data, save states, thumbnails and related details.

MUOS/wasabiWasabi content and folder settings, history, bookmarks, screenshots and downloaded filters, shaders and overlays.

MUOS/themeInstalled themes, active theme data and local theme overrides.

MUOS/packageInstallable catalogue and configuration packages.

MUOS/screenshotScreenshots taken with the screenshot hotkey.

The storage configuration decides which mounted storage holds MUOS. Use the on-device menus or the Web Dashboard for routine management, so caches and generated files stay in step.