Might not need to think on the Read/Write here actually, considering the latency it’s probably only able to do but so much with what it gets.
Do you have a firewall that could be interfering with the application?
It’s possible another application is using the same ports, this could cause a similar kind of congestion presenting as latency.
Is there anything in the log led by LogDerivedDataCache with any errors during operation? (it likely won’t have anything since I believe the engine log only works with the local cache, but it’s worth a look).