I had to move all my pictures to new external hard drive and the folders were merged when migrated to new hard drive Now my LR 5.3 can't find the files.
How do I make LR find the moved files on the new HD?
Basically, you just need to right-click on your folders that are shown as missing and find the missing folders. Point Lightroom to the folders on the new hard drive, and you should be good to go. If you have your images all organized under one master folder, all that is necessary is to find the master folder and all of the subfolders will automatically be updated as well.