Folder structure and using on LG SMart OS tv

My Cloud OS 3 Personal & Network Attached Storage My Cloud
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Have you read the suggested FAQ thread?

http://community.wd.com/t5/WD-My-Cloud/FAQ-Twonky-DLNA-Media-Server-Setup-amp-Use/td-p/858810

Where did you put your media?  Can you use a file browser on your computer to find the media and tell us where you’ve put it?  What is the structure of your media store: are all the files in one folder, or are they in hierarchical folders?