I have a question mark next to several folders in Lightroom. I want to save one of the folders which was a previous upload. I can see the picture but when I click on it, it says the file name "DSC0022.NEF" is offline or missing. Is there any hope of retrieving them?
It will depend on what has been done to the folder of images-
If you used Finder/File Explorer to move or re-name the folder, then it can be re-linked to the catalog-
Refer to info in this link- paragraph "Locate Missing Folders"
and info about 'Missing photos" here-
If you used Finder/File Explorer to Delete the folder- then they are gone! They may still be in Trash or Recycle Bin, or on your camera card, or if you are very lucky you will have made a backup of you camera images on another drive that you can restore.