If you are using RoboCopy to make backups, you might have noticed it's a bandwidth hog. Once you start copying, it will saturate the network making it a bit annoying to copy anything else at the same time.
While RoboCopy has no understanding of bandwidth limiting, there is a concept of inter-packet gap pause. Yes, you can go and calculate it (with a varying degree of success) or you can just test a few runs with different
I personally found that
/IPG:7 works wonderfully for my background backups.