I reported it too the day that started the thread, and receive this answer
Thank you for contacting Western Digital Customer Service and Support. My name is [Deleted]
It seems as though you may need to allow access to each share for the other users, as I believe each folder may only have access available for the intended user.
You can apply the proper permissions through the Dashboard, under Users for each share.
If you have any further questions, please reply to this email and we will be happy to assist you further.
Western Digital Service and Support
Then I reformulated the question, probably I didn’t explained myself properly, but didn’t get any response.
Perhaps I am in a rush, but the product is still in the return window and the lack of a simple “solution is in his way” doesn’t help.
I have to say that own two MyBooks and I am very happy, because that I decided to buy this one.