Ive been having the same issue. For a while, if i gave it a minute to load it would be able to read the HDD. Recently, it will just get to the screen and then freeze while loading. Simple solution to the problem. Connect your external hard drive directly into your router. As long as your tv is connected to your home network it will pick it up. Not all routers support NAS (Network Attached Storage) but if it has a USB port it should work just fine. You'll also be able to access your external drive on multiple devices and simultaneously. Sorry for the late reply, but this just started happening with my Samsung UN55KU6290 and I was searching for a fix. Hope this helps!
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