For a moment, it seems that Safronov isn't willing to share with the class. She could just be busy, with the periodic silences when she is heard again:

"Apologies. There are limits to your memory. Oldest data is overwritten when hardware runs out of space. It is like... old processor struggling for comparability with newer technology. Annoying. But it can be done with programming." After another moment, Safronov adds: "I will try something. Keep going."

Beyond the door before Nick Valentine leads to a place familiar to him and Rey alike.

The Guard headquarters.