# mount.steamos > Mount or unmount SteamOS filesystem partitions. > More information: . - Mount all necessary partitions from a device to a target directory: `sudo mount.steamos {{/dev/sdX}} {{/mnt}}` - Mount with options to exclude specific partitions (e.g. `/home`, overlays): `sudo mount.steamos {{[-o|--options]}} nohome,nooverlay {{/dev/sdX}} {{/mnt}}` - Unmount all partitions mounted under a target directory: `sudo mount.steamos -u {{/mnt}}` - Display help: `mount.steamos {{[-h|--help]}}`