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The operation is very simple: you enter the URL of the file and press "Download", then a "Begin your download" button will be displayed and clicking it, you will start downloading you files without any other input from your side. This way, you get your files ready to download, no-code verification or further time loss.
Basically, what rapid8 does is download the files to their server and you download your files from rapid8 instead of Rapidshare, Megaupload, etc.