If you share significant parts of a copyright protected work, you're probably still on the hook. For most things, it's not actually the files that are copyright

If you share significant parts of a copyright protected work, you're probably still on the hook. For most things, it's not actually the files that are copyrighted, it's the content encoded in them. At some point, I suppose things get very fuzzy, e.g. you're just uploading a single second of an album, but I don't know who practically useful that would be.