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Recently at work I had to deal with a WebDAV file transfer. I needed to copy a set of files over a WebDAV connection to my Windows 7 workstation. A couple of files had a file size that exceeded the maximum size that Windows 7 allows to transfer. By design the maximum allowed file size that can be transferred with WebDAV is 47.68 MB (50,000,000 bytes).

Fortunately there is a way to increase this size. For Windows 7 you have to take the following steps:

  1. Click Start, type regedit in the Start Search box, and then press ENTER.
  2. Locate and then click the following registry subkey:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters
  3. locate the DWORD FileSizeLimitInBytes
  4. On the Edit menu, click Modify.
  5. In the Value data box increase the Value of 50000000 (in bytes) to the necessary size.
  6. Exit Registry Editor.
  7. Restart the Web Client Service

(Users with Windows XP or Windows Vista can follow the descrption in http://support.microsoft.com/kb/900900/EN-US in the section Let me fix it myself.

Source: Microsoft Knowledge Base