What “photo app” are you using? The WD Photo app was retired several months ago…
http://community.wd.com/t/software-notice-wd-photos-being-retired-5-9-2017/185602/
If you are using a web browser and accessing MyCloud.com and are running into a problem seeing all the folders the its a known complaint certain users are experiencing with Chrome (for example) and MyCloud.com. The workaround, until WD fixes the issue on their end, is to use another web browser.
