system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Where do uploaded files go?

Okay, had a big discussion last night with 3 more friends about the nature of the Internet. Since our perceptions were a bit altered, and there where no engineers in the room, this turned into an all-out debate.

Sorry for the misconceptions, but here goes.

When you have, for example, a 2MB file in your computer (without a web connection), that file has a "physical" element right? Somewhere in the hard drive, something is modified because of that file. But, when you connect that machine to the Internet, and you upload that file, where do those 2MB go? I concluded that the Internet was like an infinite and intangible hard-drive on which infinite information could be put. But HOW CAN THAT BE? I simply have no idea what I'm talking about, I'd love for anyone to explain it for me. Like I was 5, of course.

Thanks a bunch! 

**EDIT: Great and clear answers guys, I certainly appreciate it!**
gpt
Part of why you are having conceptual difficulty here (which others have addressed) is because the internet isn't just a big sea of information: it's a network of other computers. Any data "on the internet" is hosted from a specific computer somewhere.