1. Log in to Control Panel then, click "WebHosting Plesk".
2. Select the domain name of your website that you want to add files/directories.
3. Click the "OPEN" button in the "FILE MANAGER" settings in the "Access to Website" column.
4. Select a directory you want to add files/directories.
5. To upload a file/directory you already have/create, click "Upload" then select a file/directory on your OS's file manager.
1) To create a new file, click "New" > "Create a new file"
2) To create a new directory, click "New" > "Create a new directory".
