Windows 10: Extremely slow file transfers internrally

I'm using my old 4 years old gaming gig as a Plex server. I ran out of room on the array I had set up with three 8TB drives and purchased two new 18 TB drives. I've tried to copy the files over to the larger drives and have attempted this to both drives. They are each set up as simple drives instead of another array since I only have 2. It's took 2 weeks and still only moved a couple video files. After a week or so, I'm unable to log back into that pc as it sits and thinks when I try to log back in and and does nothing, after a few hours of trying I'm forced to do a hard restart to get it to

:)

 

Extremely slow file transfer from computer to external HDD

Extremely slow file transfer from computer to external HDD

I am almost sure it has to do with Malwarebytes real time protection which I recently installed, and I am not a complainer but this is almost ridiculous.

Robby

 

transfer speeds ,copying files extremely difficult

transfer speed to 3.0 usb from explorer file in pc extremely slow,worst i ever seen.all day to transfer one iso file.

 

Extremely slow intranet file transfer speed

Windows 10 Pro
Build: 1709
OS Build: 16299.309

I have three pc's on my home network. One had windows 10 from the factory the other two were Win 7 and 8.1 and all were experiencing 70-90MB/sec file transfer speeds. My internet was and still is 60MB/sec. After upgrading to windows 10 the file transfer speeds went to 5-8MB/sec. Internet speed is unaffected.

I have followed many forums and tried every suggestion and nothing has resolved this issue. The last big windows 10 update did slow down the native windows 10 machine from 70-90MB/sec to 50-60MB/sec. Also, the native Win 10 machine is connecting via wifi and others via ethernet (wired)
Any new ideas? Yes, latest drivers. Yes, Large Offload is disabled and many other suggestions.

Thanks in advance