If you are experiencing problems with Windows 7 and WebDav, it could be due to the file size limit setting. You might not receive any error messages at all, or you will receive an error like: Error 0x800700DF.
You can test your WebDav settings by trying to upload/download a file that is greater than 50mb. If you have issues, then you will need to apply the following edit to the registry. Please note: any registry edits are done at your own risk.
There is a setting that limits file size and by default it is set to 50mb. By simply increasing this value, your problems should go away.
Fix WebDav File Size Problem
1) Open the registry editor, type “regedit” in the quick search box and hit enter
2) Browse to the following location:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\WebClient\Parameters
The key you will need to edit is FileSizeLimitInBytes.
3) Open FileSizeLimitInBytes key by double clicking it and click the Decimal option. This will display the file size limit in bytes. The number below – 50000000 represents 50mb.
4) Change the value data to a higher number. The maximum you can set is: 4294967295, which is approximately 4GB.
5) Click OK and you are done. You may need a reboot for changes to take effect.
