Astromech Droids are like the swiss army knives of the empire... This way Darth can have his morning run whilst privatly listening to the new imperial march techno remix by Daft Punk TOTW: Pop those Props
When Darth just started working for the empire, he needed his pic taken for his ID card and security clearance. he thought all copies of this photo where eliminated, but one showed up in the core memory of a redundant astromech droid...
“Yo-to-the-Da!!”