diff --git a/home-manager/fred.nix b/home-manager/fred.nix
index d95da40..4665128 100644
--- a/home-manager/fred.nix
+++ b/home-manager/fred.nix
@@ -45,6 +45,11 @@ in
     # Off by default; yazi is keyboard-first.
     settings.mgr.mouse_events = [ "click" "scroll" ];
 
+    # g m → mounted USB drives (udisks2 mounts under /run/media/$USER).
+    keymap.mgr.prepend_keymap = [
+      { on = [ "g" "m" ]; run = "cd /run/media/fred"; desc = "Go to mounted drives"; }
+    ];
+
     # Colour NAMES, not hex — the whole point. "reset" means the terminal's
     # own fg/bg, and the eight names map onto ghostty's palette, which our
     # ghostty.conf fills from the wallpaper:
diff --git a/settings/desktop.nix b/settings/desktop.nix
index ad50866..d4d98e0 100644
--- a/settings/desktop.nix
+++ b/settings/desktop.nix
@@ -67,6 +67,9 @@
         enable = true;
         automount = false;
         tray = "never";
+        # "Open" button → yazi (Super+E's spelling; udiskie appends the path).
+        settings.program_options.file_manager =
+          "${pkgs.ghostty}/bin/ghostty +new-window --working-directory=/home/fred -e yazi";
       };
 
       dconf.settings."org/nemo/window-state".start-with-menu-bar = false;