While I think DG was extremely polite and accurate in her response, please allow me to honestly question you here.
This is an original, so this means that the person worked hard to come up with their own world and characters, to develop a plotline of their own.
I understand it was for your private collection, but have you seen our Hall of Shame? We publicly shame and ban people who take other people's stories and post them - EVEN when the reason is just that they wanted to share so more people can see it.
Would you go to a library, read a book, decide you like it and just photocopy the entire book so you could keep it?? I'm going to guess your answer is no, you wouldn't as that would be most decent people's answer. So if you wouldn't do that to a published author from a library, why would you disrespect one of our authors in such a manner? Just because they decided to share it on an archive for free doesn't make it any less theirs or deserving of any less respect from the readers, so pardon me while I say shame on you.