Samsung UN55ES8000GXZE - Manual (Page 654)

the PVR (Personal Video Recorder)
function and a device that supports the
HDMI-CEC feature, recording by the
PVR function takes precedence.
●
If the USB device has failed the Device
Performance Test , the USB device must
go through the Device Format and
Device Performance Test again before
you record with the Guide or Channel .
●
The Timeshift functions can only be
used with a USB storage device that