Every file has a unique name (a hash). People can host it on multiple servers in the world (AWS, Cloud Flare, or home computer). When you need the file, the fastest one supplies it. Always guaranteed file hasn’t been altered because of the hash.
Discussion
That was 4 sentences, dammit.
So like limewire for all files? But using Nostr?
Kinda, yeah. Except it can be the file storage for anything. Your website images could be served from it, podcast files, etc.
Rather than replacing the big cloud providers, it spreads your files across them as well as home servers.
Nostr is for text as Blossom is for files.