In A New Hope, Darth Vader on Tantive IV says: “several rebel transmissions were beamed aboard this ship from rebel spies…”.
Except that, in Rogue One, we see that the plans were NOT beamed onto Tantive IV - it was docked inside Mon Calamari flagship, and the plans were physically sneaker-netted through a door from one rebel to another as a data tape - witnessed by Darth Vader!.
Vader clearly knew what the tape was from the novelization:
The voice of a stormtrooper spoke to him through his comlink. “A data tape was recorded on the bridge just before we boarded. No sign of it here.”
The security door opened a mere crack and rebel hands shoved the tape through. Vader reached through life and matter and air and by will alone he pulled. He fueled his will with rage and fear and need. It was enough to tear the rebel from the door and drop him at Vader’s feet.
But it was not enough to claim the tape.
He grasped the rebel sprawled before him by the throat, lifted him and stared at him through bloody lenses. “Where,” Vader demanded, “are they taking it?”
Is there an explanation for this discrepancy?