Recover from file transfer problems

Imagine this scenario: You're copying thousands of users folders and files between servers when a file that's locked as "in use" causes the process to fail. You correct the network issue and want to complete the file copy operation with only the files or folders that have failed to copy. Here, a "No to All" button would be priceless, as it would save you from having to hit "No" thousands of times, just to prevent the re-copying of all the files and folders. Fortunately, there's an undocumented way to give this response: Just hold down the Shift key when you click "No". This is interpreted as a "No to All" response, and it can save you hours of frustration!.

A co-worker showed me this tip, now I have the option to over write one file, all files, don't overwrite one file, or DON'T OVERWRITE ALL FILES (holding the shift and clicking no)