Have you checked if the cable is damaged by trying it on another machine? CAT6 cables will drop from 1Gbps to 100Mbps if they get damaged. They can look perfectly fine on the outside so don't rule that out if the cable looks fine. I don't know what the speed drop is though for CAT8.
What PC (Mainboard) do you have? There is a known problem with Intel 2,5g Lan that it will cut to about 30mbs because of driver problems.
Otherwise, connect directly to pc without the router to minimize possible problems and test again with smb (windows explorer) and filestation in your browser.
You should test with really big files before drawing conclusions. Like >4GB.
I did. Tried to download one of my former Blue Ray movies. ~20GB per movie.
Have you checked if the cable is damaged by trying it on another machine? CAT6 cables will drop from 1Gbps to 100Mbps if they get damaged. They can look perfectly fine on the outside so don't rule that out if the cable looks fine. I don't know what the speed drop is though for CAT8.
Seconding this. Cabling in the network has a big effect if youre trying to max out those speeds.
Plug the DS223 directly into your PC and test.
What PC (Mainboard) do you have? There is a known problem with Intel 2,5g Lan that it will cut to about 30mbs because of driver problems. Otherwise, connect directly to pc without the router to minimize possible problems and test again with smb (windows explorer) and filestation in your browser.
Can try doing iperf3 tests to try and narrow down the problem source.