The storage device is where the copy of the copyrighted media resides. The CPU, speakers, headphones, video display, RAM, etc. are all transitory in their involvement of piracy; but the hard drive/USB stick is "where" the violation is taking place.
Again, devil's advocate here! This is mostly a thought exercise.
Some media companies have tried to sue switch makers over the fact that their switches temporarily hold copies of the sent media in their cache without a license.