I think I messed up, and am trying to figure out how to rectify it before just blundering on. I recently drag-dropped my Lightroom images, the ones in the folder that's indexed by dates with subfolders, to my external HD. Then I deleted the folders on my laptop. However, I did not move the LRcat over. So when I open up LR now, (this is LR3 beta) the images show up, but says that file cannot be found. Even with the HD plugged in. I thought it would be like Aperture, and work with just the images over on another drive. Hmmm. So, I did look at a few tutorials, and one said while LR is open, drop the catalog that way. Should I restore the images and start over? Or is it safe to drop the catalog that way. Or, should I drop it the same way, while LR is closed and just drag/drop on over. I've also backed up on a different HD using Time Machine. Maybe I should plug that one in and use that to work on my images? I'm just not that familiar with Time Machine, yet. I just wanted to do it, just in case, and have yet another type of back up. Hopefully this won't be so confusing to me eventually!