U also need to enable Samba share and need to create an share folder linked to your Volume.You also need to create User for Samba share and need to grant read,write permission to that folder.
Than on your Windows PC, go to run,type your NAS path eg. \\easynas\ , hit enter, you will see Created share folder and a popup forasking for entering username and password, enter the same what you have given on esynas user creation,it will allow you to access now..
Sorry for worse English language..
But I think you had understood.