I have 2 HDDs, One 2TB empty and two 1TB full. I just want to copy everything from the 2 HDDs to the bigger one.

I tried using the "normal" windows copy but windows refused to copy some files due to the large file path?!

In the end only some data were transferred! I am looking for a robust solution to do the job. Really, is there any way to do this without disk images?

  • Did you try using command line?
    – Ashtray
    Feb 28, 2014 at 13:19
  • what command exactly?
    – Luka
    Feb 28, 2014 at 13:19
  • This is the limitation I talk about stackoverflow.com/questions/265769/…
    – Luka
    Feb 28, 2014 at 13:20
  • 1
    I would recommend the command line utility "robocopy" (robust file copy, see technet.microsoft.com/library/cc733145). Are you using different filesystems?
    – nappo
    Feb 28, 2014 at 13:35
  • No, I use NTFS. Thanks for the tool, I will check it out
    – Luka
    Feb 28, 2014 at 13:45

1 Answer 1


To just copy all files & folders use Microsoft's robocopy (robust file copy) command line utility.

Basic usage:

robocopy X:\ Y:\destination-dir\ /MIR

This will copy all contents of X:\ to Y:\destination-dir\ and also remove any data in destination-dir\ not existing in X:\, so use with caution. Run this command, customized to your drive letters, and use different destination directories or the first one gets deleted!

You might want to run this command as administrator to copy files you don't have access to.

More info about robocopy & it's usage: http://technet.microsoft.com/library/cc733145

  • Emphatically yes. Copy and XCopy don't deal well with huge amounts of copying; Robocopy is explicitly designed for that purpose. Please don't ask me why Microsoft's basic copy commands have problems with this; I can't think of any possible excuse... but Robocopy also has a lot of additional options which make it particularly good for this kind of task, so it would be worth considering even if Microsoft's built-ins weren't Broken By Design.
    – keshlam
    Feb 28, 2014 at 18:20

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