On the administration page, click on the Media Manager button.
You can create a new folder to hold your files. To create a folder, enter a name for the folder in the Create Directory field and click on the Create button on the top right-hand area.
To upload a file, choose the directory it will reside in from the Directory dropdown list. If you are uploading image files to be used in the static content pages, please choose stories or any sub-folders residing in it as the directory. Click on the Browse button to locate the image on your local computer that you wish to upload. After locating the file, click on the Upload button on the top right-hand area to upload the file.
To retrieve the URL of a media file, click on the media file and the URL (embedded in the img tag) will appear in the Image/URL Code field.