Explorer fails to download huge files with "Error 0x800700DF". Does the solution exist?
Windows clients have a hard-coded limit of file to be downloaded via WebDAV. This limit is set to 50 000 000 bytes (less than 50 MBytes). The limit per se can't be removed, but it can be set to 4 Gb on the client. To fix the issue, you need to open HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters key in registry (on the client computer!) and set FileSizeLimitInBytes parameter to 0xFFFFFFFF .