Have you read information that is provided in Help? How about the User Manuals?
For SmartWare did you choose a share to backup to by using the dropdown menu? See image below. Are you doing a category or file backup?
If you have five PC’s plus mobile devices surely you should be able to use this one, the My Cloud. See image below.
Edited: For the Windows Explorer problem, try this link to another discussion about this and see if it helps.
http://community.wd.com/t5/WD-My-Cloud/Windows-explorer/m-p/826685#M24790
Posted by,
cat0w (USA)