I have also recently purchased a WD TV Live Hub and when it is working then it is great - just what I wanted.
But I get the same problems as you Lawrence and some you didn’t mention:
(a) It hangs quite often when you are selecting options, for example to play music stored on my NAS and as you say you have to power it down. I don’t think the type of files you are copying is relevent, after all in any OS a file is a file is a file. In Windows for example a dot exe file is the same as a dot txt except you can do different things with them when they are opened. But for copying they are the same.
(b) Another example was when it caused me to lose the ability to Browse network resources on my network. My PCs could still connect but not browse network resources. Reboot of the whole kaboodle sorted this.
© Last night we had just watched a TV program on BBC iPlayer (via the WD service option) and afterwoods I could not access my media library ot any shares. The network check passes and as I said I could run internet services. So it’s not my wifi dongle. Just what is it doing to my network?
(d) I left my hub and NAS powered off last night and looked again this morning. I could open Network shares but again the media library apperaed not to be there and when I checked in the Setup I found all of the shares I had created had been removed. Tell me how wifi could have done this please?
I am not sure this box is fit for purpose and I think I will ask Amazon for a refund.