Currently I have my "RAW" photos residing on an external 1Tb HD. And I have the various "processed final" photos sitting in various subfolders on my iMAC desktop internal Hard Drive. All the photo subfolders are under the main standard MAC folder "Pictures". These are all catalogued using LR3. I have recently purchased a DROBO 4 Tb Raid External Hard Drive unit, and I want to transfer or move all of my processed final images from the iMAC desktop internal HD to this DROBO external HD unit.
How do I, in LR, move these folders with all their images from the iMAC HD to the external HD without losing the LR catalogue tracking? I tried the approach of "creating a new folder" in LR for the new external HD via the Library module [to which I'd drag and drop the internal HD folders] but once I select the external DROBO HD device as the new folder location all this approach results in is it then asks me to import images from the external HD [which of course has no images on it] into the internal iMAC HD.