Samsung UN46ES6100GXZE - Manual (Page 677)

Recording / Timeshift (Troubleshooting)
for PDP TV and LED 6100 series and above
The USB device is not recognized or a
Device Format, Checking Device or Device
Performance Test fails.
See the manual for the USB device to
check that the USB device supports
recording.
If the USB device has a lock, ensure it
is off.