To add files to an existing folder:
Navigate to the folder by clicking it in the folder tree, using the Forward and Back buttons, or clicking a breadcrumb link.
Click the (
) button in the top-right corner.In the dialog, navigate to the files you want to upload, select them, and click .
The uploaded files are linked to the currently clicked/highlighted folder, known as the current working folder. They are given the permissions of the parent folder (the folder they are uploaded to).