I want to back up my photos to my external hard drive (can't believe I haven't done this yet!) but it seems lightroom is a bit of a **** to use in this regard (and in many others, but I digress). I understand that the catalog backup option only backs up the previews, locations of files etc, but I want to back up every single photo, as well as the sidecar files so that I can revert back to it if things go pear shaped. So how do I do it? I've tried googling, and unbelieveably I can't find a solution that doesn't involve buying more software. Please help!!