This seems like it would be a great way to make long lasting milk which doesn't taste like UHT milk. Apparently it does work, but perhaps regulation hasn't caught up with it yet [0].
Edit: Seems that it may not be as effective in milk because of a pressure resistant enzyme [1]
Yeah, as you add things it takes a photograph of it, then you can browse those. The new item is placed inside section A (short term), which is then pressurized. The item is them transferred to section B (long term) via automation.
On requesting an item the automated insides transfers it to section A, closes the hatch between A and B, then de-pressurizes A.
To elaborate on the other comment, the ideal gas law isn't applicable when you can add or remove energy/mass to the system. There's no reason you can't pack a refrigerator sized chamber with enough air to be high pressure at a low temperature. Based on the equation, you get to choose what n is so you if you set T to a normal refrigerator temp of ~4C then you can vary n to get whatever P you want. I hope that made sense.