Inside the complex, at the fist computer room under the stairs.
Side note: Here in this room are two doors. A gray one that opens and a closed pink one. Behind it is the Ark Chest. We're getting there...
Storage 2, 3, Ark Chest and Data Pad:
Now you roughly know where to go.
Take the other door if you can't go through the pink door yet. Cross the cafeteria and in the corridor is this door. Go through it. There is the Ark Chest, Storage Container 2 and Storage Container 3.
The Data Pad is in the shelf close to one of the Storage Containers.
Now go back inside, deeper into the complex to the main control room.
Go down. The last Storage Container is in the janitor room.