Windows (Server) prioritize network or disks possible

I have two questions:

Can I prioritize a network share to some maximal download speed? Or does windows automatically slow them down when the system is doing heavy IO?

Independently from that question, does the priority of task in the task explorer also affect the disk usage directly or is this only done by telling the cpu scheduler to not execute the low priority app as often

Background: I’m noticing that if I push files via network onto a machine, then machine can work better than when I’ve got a tool installed on the machine that downloads files