Ask HN: What is your favorite method of sending large files?

I just opened up a simple HTTP server to send someone a large file. Then I figured, I never gave this question proper thought.

But some of you have, and I figured they make for fun and interesting stories ;-)

So what's your favorite method to send large files, of at least 5GB or bigger? Though, I'm also curious on how you'd send 10TB or more.