Originally Posted by
F8&Bthere
Well, if I am understanding your question correctly...
When you initially set up Lightroom you likely chose a master folder location to store your images in. It sounds like that location was a folder somewhere on your 500G external drive. So then I guess every time you import new images, you have LR set to move them from the memory card (if you do it the way I do) to that folder and add them to the LR catalog (database). Any further manipulation of the images and subfolders in that folder on your external hard drive should only be done from within LR. Don't delete, move, or add images directly to the folder through windows explorer, or you'll make the LR gods very unhappy.
. :)