use robocopy to copy a very large file across a network

robocopy is a built in tool, in Windows XP and above, to reliably copy files.

here is a handy command, to copy a single large file, and robocopy will restart and retry in case of error:

from the command line:  (Start | Run | cmd /f)

 robocopy /ZB /ETA sourceDir destDir myFile.txt  

WARNING: robocopy is very powerful and can be destructive.  in particular, the /MIR option will delete any files in the destination directory, that are not found in the source directory!

for more details, see the robocopy built-in help:

 robocopy /?  

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