For a long time on Windows, I had to "copy" a complex directory structure, never use "move". A file lock could bork it. No meaningful indication what file was

For a long time on Windows, I had to "copy" a complex directory structure, never use "move". A file lock could bork it. No meaningful indication what file was locked. No meaningful indication what was locking the file. The process simply stopped. It got much better after Win 8 onwards.