I recently bought the WD Mirror 6Tb to both back up my pictures and to access them from “anywhere”.
To my huge disappointment, this device (the only from WD Live?) can not be accessed from https://www.wd2go.com/, i.e through a normal web browser
So to access the data, you MUST download an app.
I am using computers where downloading an app is not practical and/or allowed (for instance at my workplace) so my Mirror is now just a very expensive simple harddrive.
I really hope WD will fix this in the next firmware update.
In my view, accessing the harddrive through the web browser is the most practical and secure way. Dropbox is in my view excellent to use through the browser.