We should never examine the plots too much with summer movies, but couldn’t Zemo have achieved exactly the same result by just emailing that file to Stark where his parents were killed? Why did he need to have them all in one place, when so many events leading up to that point could have been different? Literally an email. It would have been over in 5 mins.
A small quibble in an otherwise very enjoyable movie. The action in particular is very, very well done!