Hello fellow LR users,
Last night, I attempted to drag one sub-folder into a different Parent folder but then I received the "unable to move & unknown error" notification. After a few more attempts I received the same notification. My solution was moving the folder into the different Parent folder outside of Lightroom. I moved the folder in my PCs Operating System.
Has anyone else encountered this issues? Any solutions?
Your method of using the OS is considered best. If you copy (drag) a folder to a new place you simply right-click on the folder name in the LR Library and choose update folder location. Then navigate to the new location.
LR automatically updates the catalog database. You can then delete the original folder.