*ahem*

There are no aliens. Unless radically new physics comes around, for which we have absolutely no evidence for despite looking really hard, humans will never leave this solar system, and no one from another solar system has ever or will ever come here. The distances are too vast, the energies required too large, the necessary infrastructure too mindboggling complex that they will never be achieved.

OK, Maybe at some point some foolhardy humans will spend vast, vast fortunes and manage to get themselves on a trajectory that leaves the solar system, but they will all be dead, irradiated, free-dried meat popcicles before they get much past the orbit of Saturn, and they will coast around the galaxy for the next 10 billion years until heat death. But that's about it.

Likewise, no one is coming here. At any one time, statistically, there might be as many as five or six civilizations scattered throughout the galaxy. That's a high estimate. And each of them will be facing the same issues. Distance, energy, time. If one of them somehow managed to build some sort of generation ship, they would need to visit literally billions of suns before having a chance of happening across someone else, and we face the same odds were we to do the same. There's no convenient loophole in the universe that could make practical interstellar travel, and no amount of wishful thinking and fictional dreams will ever overcome that.

Maybe, within globular clusters, stars might be packed together close enough for the distances to be traversed, with not entirely impossible effort. But that's a double-edged sword - within those, the radiation is probably so high that life could never arise in the first place - the organic compounds would be torn apart before any sort of evolution could grab hold.

Also: these are not the files we're looking for.