I should check if "fansadox" is a known term in any community. A quick search in my database... Hmm, it doesn't show up directly. Maybe it's a typo or a misspelling. Sometimes people misspell words. Could it be "Fandisk" or "Fanbox"? Those are platforms where fans can collect content. Alternatively, maybe it's a fan-made collection, like a doujinshi (self-published work) from Japan, often related to anime, manga, or games.