So, I have a new Mac Mini with a 1TB HD and a new Sigma DP2M. Use Aperture for editing after creating the TIFF file. I use Time Machine for backup. The X3F file is about 45 MB and the TIFF is usually about 85MB, so if one saves all of the data it obviously won't take long to fill up the HD. Wondering how folks are handling the huge amount of data storage? Do you keep your X3F files once you've created the TIFF? Keep your photo library on an external HD? I realize there are likely many different ways to handle this but looking for options. Certainly, the huge files impose an discipline not present with my previous digital cameras, so I'm not taking nearly as many shots. None the less I'd be interested in how people approach this.