As stated for some, spouse and pets are safe. You have a phone call stating that they are in another city. Whether by teleportation, beam-me-up-scotty, or city bus, they are nowhere near the fire.
Now, what would you save?
I once ran into a burning building (early stages) to get my pocketknife. That was when I was young and dumb. Now I'm just dumb
Now, depends on what floor I'm on.
I'd probably throw my fileserver and PCs (mine and wife's) out the 2nd floor window. The case would mangled, but the hard drives, as long as they had spun down, should be fine.
If I wasn't close enough (downstairs) then I would probably grab the urns from our past pets. Since their collars and pictures are right next to the urns, I'd grab them as well. That would mean alot to my wife. My shit can burn, I've had nothing in the past and can rise up from nothing again.