Are you trying to copy you data from the windows 7 system to the NAS server, then create a NAS Share then make user with password or use Guest without password for the Share.
This video from the link below shows how to access your data from a created NAS volume from a windows system.
http://www.open-e.com/library/webcasts-and-videos/
2011.02 How to setup your DSS V6 in 10 min