It might help to get a useful answer if you (a) tell the exact model and (b) link to the user manual.
I have a new Samsung smart TV and can successfully record and playback to a flash drive. However, when the TV is recording to the drive, the TV locks me out of other channels giving a message "Recording conflict". I have to cancel the recording to change the channel.
With two tuners, I thought this would be avoided, any ideas how to overcome this please?