I use Lightroom with a 350D and store most of my photos in RAW format. However, my disk space is limited and I would like to shift some of my collections on to DVD or external hard drive. A Google search reveals this is way more difficult than it first looks, so I'd like to hear about your workflows and how it helps you. From what I can tell you can either store a permanent copy on DVD which you then delete locally (and have to re-import later if you need it), or expand your storage by working off an external drive. Backing up to DVD might be cheaper but seems to have limitations. You need to store any metadata in separate files plus the Lightroom catalogue I think. And of course the media may scratch or damage. Whereas with an external drive it should be possible to rsync your entire Pictures folder to a second external drive. But it costs more money. Some day there will be an online photo hosting service that integrates. Until that time, what do you do and why?