Can not see my folders or files in My Cloud


I got a new WD My Cloud EX2. It works fine and I can se all my folders and whats in them from my Mac Book Pro. 

I have a copy of my MacHD where I have a lot of subfolders. But when I am using My Cloud in my ipad or Iphone i can not see whats in my biggest folders (pictures and dokuments). In smaller folders i can see the content, but not when I have many subfolders and files inside them. Do anyone know why?

The problem is solved. Some Icons on the folders was not original. Whwn I changed the icons to original mac-icons everthing was visible again, in My Cloud on ipad and iPhone.