I'm trying to figure out how to speed up my Robocopy file copies. My network is two Windows 10 PCs with Gigabit network cards, connected via a Gigabit switch. I've run the tests (A., B., C.) below.

I have a customer who is using RoboCopy to backup their file son a server. It has been working fine and then after upgrading some of their computers from XP to Windows 7 we started getting Access ...