try to disable delete button on root disk

app/UI/Disk/Buttons/DeleteButton.php

@@ -32,7 +32,7 @@ class DeleteButton extends ButtonDataTableModalAction implements ClientArea
         $this->setDisableByColumnValue("master", true);
         $this->switchToRemoveBtn();
         $this->initLoadModalAction(new DeleteModal());
-        $this->addHtmlAttribute('hidden', true);
+        $this->addHtmlAttribute(':disabled', true);
     }
 
 }