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I have some Windows Server 2003 and 2008 boxes that have files I need to copy that are in the range of 20 GB to 80 GB ranges. The 20 GB files transfer without a problem from one server to another using UNC path. The 80 GB files do not. I get a message telling me that is out of space. I am transferring from the D drive on one server to the D drive on the other which has a few hundred GB left. However, the C drive on both servers only has 60 GB left. Is this the limiting factor? If so, why? This happens with drag and drop, copy and paste, and robocopy.

John Wesley Gordon
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  • Can you post the exact error message that robocopy gives you? Do you have any quotas set? I assume the both the source and destination filesystems are NTFS? – Zoredache Nov 13 '13 at 22:17
  • I wonder if this has to do with buffered file copies. Try getting your hands on eseutil.exe and ese.dell from an exchange server, then use it with the /j switch to perform an unbuffered copy. – phoebus Nov 13 '13 at 22:20
  • @phoebus - xcopy (builtin) can do that (same /j switch) but it is very slow. OP - have you tried using something like FTP instead? – TheCleaner Nov 13 '13 at 22:37
  • @TheCleaner I was suggesting that more as a test than as a solution, to see if things change when unbuffered. – phoebus Nov 13 '13 at 23:24
  • @phoebus - I know, I'm stating that there's no need to get eseutil when xcopy can perform an unbuffered copy and it is already available. – TheCleaner Nov 14 '13 at 01:42
  • I appreciate all the posts. Strangely when attempting from both servers today using the original robocopy I received no errors. The 80 GB file copied fine, so my hypothesis that it is related to the free space on C is wrong. I do not have any quotas set. If it happens again I will grab the errors and try xcopy with /j switch. – John Wesley Gordon Nov 14 '13 at 21:21

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You can not copy file into network share bigger than available space in drive C: if offline files are enabled in Sync Center. Click Start - Type "Sync Center", and check if your share is marked as offline.

This is not limited to servers, this can happen on any Windows version including Windows 7 and Windows 8.

Offline files can be easy enabled by accident (shortcut Alt + F, A -- used by "File save as"), by navigating with Windows Explorer to any shared file, and clicking "Always available offline" from context menu or file menu.

I just lost 1h searching for solution to this problem.

Maris B.
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