Trying to download more than 50Mb from SharePoint 2007 via webdav? You’ll need to know this…

If you store large files in SharePoint 2007 and are using webdav to access them (Explorer View uses webdav for example), you may be seeing the following error:

Cannot Copy <filename>: Cannot read from the source file or disk

If so, this relates to a registry key which is set on the local machine to limit the maximum file download size to 50Mb when using webdav.  To correct this behaviour, change the value of the FileSizeLimitInBytes registry key needs changing on the client machines.  To do this, follow these steps:

  • Start regedit
  • locate the following registry key:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebCLient\Paramters
  • In the right pane of the registry editor, right click the FileSizeLimitInBytes key and select ‘modify’
  • Enter a new value for this maximum file size (in bytes, as the key states) and click OK.
  • Close regedit and restart the computer.

Instead of making this change individually on each of the client machines, this key can of course be distributed via your organisation’s group policy.

One Reply to “Trying to download more than 50Mb from SharePoint 2007 via webdav? You’ll need to know this…”

  1. Thank you for this great post! It has tremendously helped us in solving a seemingly unrelated issue. We had Excel 2007 clients installed in Windows 7 workstations, talking to SharePoint 2010 farm, working with large Excel files, up to 180 MB in size. This setting has fixed the issue for us where we were getting an error message "A newer version is available. To modify this workbook, open the latest version or save a copy" for files larger than 50 MB.

Leave a Reply

Your email address will not be published. Required fields are marked *