Half the files on Megaupload were never downloaded. Those files were clearly backups that turned out to be less reliable than a floppy disk left in your desk drawer.
Megaupload Search Warrant Requests Ignored Massive Non-Infringing Use | TorrentFreak
As a direct result of the Megaupload raid many legitimate users of the site lost access to their personal files. To find out why the Government put the interests of copyright holders before those of the public, one user convinced the court to unseal the seizure warrant matarials. Surprisingly, however, there is absolutely no mention of Megaupload’s legal use in the released records. In a response Megaupload founder Kim Dotcom says the whole case is a tragic copyright comedy.