Enable auto-upgrade and automount external storage

modules/gui.nix

@@ -170,4 +170,36 @@
       setw -g window-status-current-format "#[fg=#1e2132,bg=#2e3244,nobold,nounderscore,noitalics]#[fg=#c6c8d1,bg=#2e3244] #I  #W  #[fg=#2e3244,bg=#1e2132,nobold,nounderscore,noitalics]"
     '';
   };
+
+  # Automount external storage
+  systemd.mounts = [
+    # USB
+    {
+      what = "/dev/sdb1";
+      where = "/usb";
+      mountConfig = { TimeoutSec = "5"; };
+    }
+    # SD card
+    {
+      what = "/dev/mmcblk0p1";
+      where = "/sdcard";
+      mountConfig = { TimeoutSec = "5"; };
+    }
+  ];
+
+  systemd.automounts = [
+    # USB
+    {
+      where = "/usb";
+      automountConfig = { TimeoutIdleSec = "5"; };
+      wantedBy = [ "default.target" ];
+    }
+    # SD card
+    {
+      where = "/sdcard";
+      automountConfig = { TimeoutIdleSec = "5"; };
+      wantedBy = [ "default.target" ];
+    }
+  ];
+
 }