I've yet to see that feature in the USA but USB 3.0 devices appear to not work for some. And thumb drives are much more finicky in this use. That is, you won't find many to pass that test.
have inserted hi Speed USB3 thumb drive into USB slot. TV recognises device and asks to format same. After formatting device it says "failed performance test" . I have tried with various USB devices with same effect. (1)
What brand of USB can i use to make use of recorded tv application.
(2) is there a specific format required