“I think it was Seth Rich and thumb drives. POTUS knows this too.”
I remember seeing an analysis of how quickly the data was pulled off of the DNC servers. It was too fast for ANY internet connection, let alone one that traveled through several servers (to hide the identity of the hacker). It could ONLY have been a thumb drive. Whether Seth Rich did that or not is another question (and I think that he did, which is why he is dead), but SOMEONE did that.
And, yes, POTUS knows that.