All the US 2012 and prior TV models didn't record. Hopefully you can supply the product and country information so we can look it up.
However the recording speed of most USB sticks is too slow. The usual recorder calls for the usual old HDD.
I have Samsung 6400 series 46" smart TV. Can I record TV shows without cable or satellite? Can I use a USB stick? If so what kind? Or can I do it with a sound bar? I am considering buying a sound bar. ( I don't want to pay for cable or satellite)