Building Acquisition is one of the objectives in Sub Rosa. In this objective, the player has to drive their car to a building and take the disk from NPC guards inside the building. The disk is always located on the third floor at the end of the hallway in a large room, on top of a black desk. Guards spawn inside doorways and in rooms inside the building, so always be careful and look into every door to see if there is an NPC. It is safe to shoot the third floor window and walk straight out, as long as you do not jump out and you land on your feet.