I have an UE40ES6100W TV, and earlier i saw very happy with the automatic record function. Some monhts ago I have experienced it is not working ata all, bacause the flash dive is not applicable for that function (previously it was..).
So I have double checked the flash stick, and on my windows pc is runs well, but the TV speed test sad that it is too slow (1.9Mb/s write, 0 for read).
I have asked Samsung, and they suggested me a reset to factory defaults. No change.
So if anybody had similar problem, and have the solution for that, please do not hesitate to share it with me
Samsung official service answer is "other TV-s are able to record to HDD only". It means, accidentally in the past they enabled to USB stick, and now they realized that??