Minecool

I cannot upload a .log or .txt an error message comes up saying -200. How should I upload the files now?

Hello, My friend has a problem with our minecraft server. My friend gets kicked out after a few seconds-minutes after he joins the server. However, I and other players don't have the problem. Maybe it's because his internet is via Vodafone. I then looked into the console and found an error before my friend was kicked out: NetworkDispatcher exception io.netty.handler.timeout.ReadTimeoutException