On the top Drupal Editing bar, scroll over My Workbench and select My Files
Select the folder you wish to use.
Click Upload. It should look like this.
Choose the file you wish to upload to the server. You may either drag the file from your own PC local files into this box, or press the + Add Files button to locate your files to upload.
- When you have added all the files, click the Upload button.
You will find your new file in the folder you selected.
To link to your files, see: Drupal: Linking to a PDF or other MS Office files