Rsync slow and different speed

Hello,

I will give a try on this forum because I do not understand what I am missing...

I use rsync to send movies from my seedbox to my home server (FreeNAS-11.2-U7). The problem is that the speed is abnormally low when I send the file to my server (around 1.5MB/s)
What I don't understand it's that the speed is good unless I try to send from my seedbox to my server

I did multiple test using rsync and check the speed:

Connected with SSH to MYSERVER

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  Rsync slow and different speed