This statement is definitely false.
Hieronymus Bosch lived in the 15th century, so it is impossible that he was influenced by the Surrealists who worked during the twentieth century. Bosch was influenced by Renaissance artists, not Surrealist ones.
Answer:
The plans contain the Death Star's entire design history, including the flaw introduced into its reactor system. Stolen by Jyn Erso, they are beamed to the Profundity, copied and hidden in the memory systems of a humble astromech droid.