That's not adding but attaching can you check that your uploads folder is correct please:
outside Public_html there should be a uploads folder if not it's in your public_html and needs to be moved.
That should be 777 or 700.
inside that you should have a 1 folder this is your company 1.
inside that you should have a support_manager_files folder. Also check the settings: Settings > System > General > Uploads folder