Problem: Received "Data exceeds window size" error

Solution: Based on review, some SFTP clients will commonly send more data over the wire to the server than the server is prepared to accept (the amount of data the server can accept is called the 'window-size'). If the server can accept 64K of data, in theory, the client should ask the server 'how much can you handle' and then send only that much over, but if it sends over more than the window size of the server, the server disconnects the client.

The short answer will be to use a more compliant SFTP client. You may want to consult with the OS support for suggestions on how to manipulate this 'window size.'