Having very frustrating problems after transferring my Lightroom catalogs to my new PC. My 2015 folder I missing from the catalog completely, and although I can see the 2014 and earlier folders, most (around 90%) of the images tell my the "Phot is missing". I checked the folder location, and the file are available within the specified folder. For some reason they are simply invisible to Lightroom. Same is true for all my 2015 photos - they are available on disk, but Lightroom cannot find the whole folder in this case. When I try to Synchronize the Folders, Lightroom crashes...
Right-click on a folder name and choose "Update Folder Location"
Then navigate to the folder and select it.
Thanks for the response. I have already done that, and the folder is correct.
So is it individual images inside a folder that are missing? Do they have an explanation mark?
Otherwise quit LR and re-boot your computer.
See this useful link for more information: