You can quickly bypass this error by using robocopy,
use run as administrator to open a command prompt and do the following:
robocopy /e /is /v /eta [driveletter]:\sourcefolder [driveletter]:\destinationfolder
/e Copies all subdirectories.
/is Includes the same files.
/v Produces verbose output, and shows all skipped files.
/eta Shows the ETA of the copied files.