Issue while sending files with iperf3

Hello eveyone;

I want to send a file using iperf:(From client to server.)

I used below command at server side:

iperf3 -s -F lambo.jpg

And also at client side I used this command:

iperf3.exe -c -F lambo.jpg

But only a small portion of the original jpg can be send

You can see the transmitted and original files in the links:

https://prnt.sc/MGBKLs5MA9bA

https://prnt.sc/n_Zz7T2-1ljW