I'm trying to help a relative with connecting a USB disk to her Foxsat HDR (it's a litte tricky as I don't have one myself and I don't have access to it). She was able to go into File Manager and copy a few programmes which now don't appear on the main drive's programme list, so presumably they did actually copy. But she cannot access the USB disk. Pressing the OPT+ button while in the file manager doesn't work, nor pressing Media then red for change device. Wondering if anyone can suggest anything? Does the drive need to have its own power supply? The manual doesn't mention any particular requirements.