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  5. When accessing a WebDAV service in Windows, an error message appears for files larger than 50MB (error code: 0x800700DF)

When accessing a WebDAV service in Windows, an error message appears for files larger than 50MB (error code: 0x800700DF)

When using WebDAV in Windows, if you attempt to open or copy a file larger than 50MB, you may receive the error 0x800700DF. This is because the Windows WebDAV client has a default file size limit of 50MB. You can increase this limit by modifying the registry:

  1. Press Win + R to open the Run dialog box, type regedit in the input box, and then press Enter.

  2. In the Registry Editor, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters.

  1. In the right pane, find the FileSizeLimitInBytes key. If the option doesn't exist, right-click in a blank area and select "New" > "DWORD (32-bit) Value."

  2. Change the value field to ffffffff, or select "Decimal" and enter 4294967295 (the maximum value is approximately 4GB). Then click "OK" to save the changes.

  3. Restart your computer for the changes to take effect.

  4. After restarting, try copying or editing a large file again to verify the changes have taken effect.