It'd probably, unironically be legal for CAH to go in there, literally guns blazing and kill anyone who stepped onto their property. Texas has some very, very broad stand-your-ground laws that allow property owners to shoot people running away from them.
That is to say that Musk could be in a hell of a lot of trouble for the danger he's putting his workers in if you take that into consideration.
Mhm, as a former projectionist I can confirm that those files average 200~300gb.
Why would they sell them? Cinemaphiles. Your average person won't spend $200 on a 500gb drive containing The Room, but a hardcore cinemaphile might. My boss at the theater I was working at was the kinda person who would have bought that. Well, maybe not The Room, but he probably would have spent the money for something like The Godfather trilogy.