Check my comments about an issue with device driver in this thread:
http://community.wd.com/t5/WD-My-Cloud/USB-external-drives-showing-0kb/td-p/603957/page/5
Check my comments about an issue with device driver in this thread:
http://community.wd.com/t5/WD-My-Cloud/USB-external-drives-showing-0kb/td-p/603957/page/5