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Each time you import an image, Lightroom creates a new catalog entry to record the file’s address and lists the folder in which it is stored—and the volume that contains that folder—in the Folders panel in the left panel group.
In the Folders panel, you can organize your photo library at the most basic level by rearranging files and folders on your hard disk without ever leaving the Lightroom workspace; you can create or delete folders at the click of a button and move files and folders by simply dragging them. When you use the Folders panel to move a photo between folders, Lightroom will delete the image file from its original location and update the library catalog with the file’s new address. Lightroom maintains a single catalog entry for each photo you import, so a master image cannot be duplicated in separate folders or added to the catalog twice.