Mediafire has seen to delete random downloads for no reason. As of right now, nothing I have is guaranteed to be available, and anything unavailable likely will not be re-uploaded, as I likely don't have it anymore.
I'm hoping to find a site other than mediafire. Mediafire will remove files if they get any sort of copyright complaint against them without attempting to verify those claims. For example, my Historical Society lot was recently removed from mediafire because a band did a sweeping search of all files containing "Historical Society" in the title and put claims against them! So my tiny little sims 3 lot file that maybe 70 people had downloaded was removed forever just because they wanted it to be. So I will not be using mediafire anymore as soon as I find a good alternative.