Okay.....
I am going to assume you have a Samsung SmartTV. As demonstrated in the following short video (less than 40 seconds), it is possible to record live TV.
https/www.youtube.com/watch?v=ngRzWoH0S10
1. You will need to purchase and external hard drive with a USB connection (like Western Digital - WD My Passport) and connect it to one of your SmartTV's USB port.
2. Go into Smart Hub and click the AllShare Play icon.
3. Next click the Recorded TV icon.
4. Click the channel you want to watch and record.
I do not have a SmartTV so if this does not work for you then I can't really give you anymore help.
Here is a short tutorial for a LG SmartTV.
https/www.youtube.com/watch?v=DEfuPPPx4rQ
The only other help I can provide is to use Google / Youtube to help figure out how to record video using whatever SmartTV you have. Simply type in something like the following:
Samsung Smart TV recording