system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why can't R2 send the plans to the Death Star wirelessly to the Rebel Base at the beginning of A New Hope?

Also why can't all of the hacking into  buildings (such as during the Battle of Endor during ROTJ) be done wirelessly instead of making R2 Trek through a battlefield?
gpt
Well, let's see where he was.

On the *Tantive IV*, it's being boarded by Imperial troops. No doubt they've jammed the communications array.

On board the Death Star, they're on a high security military station. No doubt all external communications are watched very closely.

On Cloud City, the place was under Imperial lockdown. Wireless access to doors was doubtlessly locked.

On Endor, the door they needed to get access to was an entrance to a high security facility providing defense to an orbital station that was still under construction. They had it locked down, too, as Vader knew Luke was on the shuttle heading down there and no doubt would have warned the officers of that base.

You know what the easiest way to "hack" into a system is? Have physical access to it.

What you really should be asking is: *why* an astromech has the tools and capabilities to hack into secure systems?

[It was also the late 70s/early 80s. Wireless communications for computer systems were basically nonexistent outside of television and radio, neither of which are really good mediums for transmitting large amounts of data - like, say, the blue-prints for a massive battle station.]