In *A New Hope*, Darth Vader on Tantiv 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 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?**