by Julieanne Kost
If you have moved files using the operating system, Lightroom will loose its link (path) to the files and display a “?” next to the missing image in the Grid view. Clicking on the “?” icon will display a dialog allowing you to navigate, locate and re-link any missing files. If you have moved folders using the operating system, Lightroom will display a “?” next to the folder in the Folder panel. Control (Mac) / right mouse -click on the folder and choose Update Folder Location to re-link folders that have been moved or renamed.