I have a usb stick with films on. I've put it in the usb slot on the TV. I choose source and I can select the usb drive and watch the film okay. If I then go to watch a TV channel, for example itv and then go back to watch a film on the usb drive, I just get a message saying loading. I've reset the TV, I've reformatted the usb drive, but the same thing happens. The only solution I have is to switch the TV off and wait 10 minutes.