Created Issue: How to access media files and folders from external sources [1677]

Hi,
I am newbie in Composite. I have selected Composite for its function to Access media files and folders from external source, like a local drive or NAS drive.
What are the steps that I have to do?
I have installed SQL Data Provider to store the data in the SQL Server instead of XML.
Now, I am able to see the tables in SQL Server, but how to access or store media files and folders in an external folder.
Thanks