Hallo everyone, this is my first post here 
I do my back up exporting catalogs from LR (Windows) and then copying them to DVDs. But almost all times there's message about errors during export. It usually cannot find files though they exist in both LR and hard drive. Recently I was exporting over 2''' photos and LR couldn't find about 5'' of them. On another attempt with the same files it reported the same porblem but with different files.
It seems to be an internal LR error. Are there any solutions of this problem?
I do my back up exporting catalogs from LR (Windows) and then copying them to DVDs. But almost all times there's message about errors during export. It usually cannot find files though they exist in both LR and hard drive. Recently I was exporting over 2''' photos and LR couldn't find about 5'' of them. On another attempt with the same files it reported the same porblem but with different files.
It seems to be an internal LR error. Are there any solutions of this problem?