i have a file or folder on my pc that i want to share with other people. let's call it gayshit.mp3

unfortunately gayshit.mp3 is 750mb and im not paying for discord nitro so i need another way to send it

i put it into qbittorrent and it makes a torrent file. this is essentially a very small file that points to gayshit.mp3 so other computers can find it. kinda like a treasure map

i send this tiny file to my friend, who loads it into qbittorrent. their computer takes a moment to find mine over the vast expanse of cyberspace and then (as long as my pc is running and the file is still where it should be), it gets copied from my hard drive to theirs

this is the cool part: if somebody else loads that tiny file, they can download it from both of us. if i'm offline but my friend is on, the third person can still get it. this also means that if two people have separate halves of the file, they can download the other half from each other. as long as some combination of people have the pieces between them, they can all have the whole thing.

crucially this does not require a server!!! you can just upload the file to a few people and as long as they keep it, it's still accessible. as long as somebody, somewhere is still connected, it's available forever. the only way it goes away is if everybody disconnects from it.

how it started 👇

But I know. I think it was me.

In my defense I never intended to start a rumor. Many years ago I worked as a cleaner at the school and one evening I had to transport one of those big floor washing machines from the basement to the second level via the elevator. When the doors opened a very confused looking man stood inside. He was one of those slicked back gym-bro IT guys and made no movement to get out. The elevator wouldn’t fit him, me and the machine so I asked “Where are you going? Up or down?”

He gave me a smug shit-eating grin and said “Down?” in a mocking tone.

It took me a second to realize that of course he wasn’t going down, we were in the basement, but his look and tone annoyed me so much I refused to admit I misspoke and instead said “Yeah, down. I don’t know if you’re going to the second basement”

His smile disappeared “There’s a second basement?”

“Yeah but it sounds like you don’t have access to it so I guess you’re going up? I’ll just wait”

I never thought of it as anything other than a funny story to tell about that time I got so annoyed with a guy that I invented an entire second basement, but it turns out he probably refused to believe a cleaner fooled him and the story spread.