I'm working with a Windows-7 computer, who needs to copy a lot of small files from the network (NAS). I used to do this using xcopy command, but due to a file lock problem, I've decided to start working with robocopy, using following parameters:

robocopy \\nas\<subdir>\ <destination>\ /E /R:3 /V /FP

I have the impression that the performance has decreased severely, but as I don't have any logs of the previous situation (using xcopy), I'm not really sure.

Can I add any flags which would increase the performance of the robocopy command?

  • A must is /NP and /MT. I use /MT:64. Do not use /NOOFFLOAD or /TEE. When using /LOG, you must add /NP.
    – AMissico
    Jun 30, 2022 at 16:36

1 Answer 1


Can I add any options to increase the performance of the robocopy command?

The following options will change the performance of robocopy:

  • /J : Copy using unbuffered I/O (recommended for large files).

  • /NOOFFLOAD : Copy files without using the Windows Copy Offload mechanism.

  • /R:n : Number of Retries on failed copies - default is 1 million.

  • /W:n : Wait time between retries - default is 30 seconds.

  • /REG : Save /R:n and /W:n in the Registry as default settings.

  • /MT[:n] : Multithreaded copying, n = no. of threads to use (1-128)

    default = 8 threads, not compatible with /IPG and /EFSRAW.

    The use of /LOG is recommended for better performance.

Source - robocopy

Further Reading


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