From the initial storage room, head east into a corridor. You'll encounter your first security camera. Observe its patrol pattern and move past it when its vision cone is away from you. Continue east until you reach a room with several lockers. One of these lockers contains Keycard 1. Be cautious, as there might be a guard patrolling this area. Once you have Keycard 1, you can open the door to the north, which leads to a more extensive section of the base. This keycard is essential for progressing further into the research facilities where Dr. Marv is believed to be held. Remember to check all lockers and crates, as they often contain useful items like rations or ammunition.
