How to find out the size of the data that was sent to the server?

Question

Traffic analysis

Friends! I’m wooden in this topic, so who’s the old and all-knowing grandfather here, tell me the butter dish. How can I find out exactly how many kb/mb/gb went to the server? For example, I have information, what is my ping to the server, how can I find out, or even where? How much data I sent to the server ( size )
Thank you all in advance!