Plot hole: Before the IMF team can exchange the yellow cards for the access control, they first need to know the data format/file type in which the access rights (retina, gait, fingerprints...) are stored. Otherwise, the computer will not recognize the data on the card, and display an error to the maintenance personnel. In order to figure this out, they would need to steal first some of these yellow cards and analyze the data on them, before they can fake a card which will be accepted by the computer.
Mission: Impossible - Rogue Nation (2015)
1 plot hole
Directed by: Christopher McQuarrie
Starring: Tom Cruise, Simon Pegg, Jeremy Renner, Rebecca Ferguson
Continuity mistake: After reviving Ethan after escaping from the water tank, IIsa's bra strap is visible under her tank top. When she changes later, the bra disappears. (01:10:00)
Benji Dunn: Join the IMF and see the world. On a screen. From a closet.
Trivia: Tom Cruise was injured six times during the filming.
Question: Why is it not possible to breach the security at the storage facility and use the robotic arm to swap the cards? It is an option never discussed.
Answer: Because no metal was allowed in the system.
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Answer: This plan is not discussed because they may not have had the hacking skills to take control of the robotic arm. Regardless of whether or not they did, it would not have been the best idea as they are supposed to be infiltrating the facility in complete secrecy. The plan of Ethan holding his breath underwater and manually planting the cards into the system is a lengthier plan, but is less likely to result in them being caught.
Casual Person