Hi Frank1940 and thanks for your reply.
Fist of all: My Problem has nothing to do with this prob described in your Link.
I try to explain what really happens (difficult):
I use mapped network addresses for my shares
\\10.10.10.250\Movies
\\10.10.10.250\TV-Serien
\\10.10.10.250\Cache
Win 10 starts the copy-process (Window comes up with this green graph), copies ~100MB or more to the share and then drops to Zero(!)
No Error, no nothing - the window with the green graph is still on the screen but nothing happens any more - like it hangs.
Only a reboot fix this error.
After the reboot all is working fine as there was never a problem... (lol).
I think its def. a Win 10 problem and has nothing to do with unraid (i think).
And now the most strangest thing: When i use the network environment (not the mapped addresses!), sometimes all is working fine, and sometimes it fails like i described... so there must be a ghost or a goblin in my machine
When i use the mapped addresses, it "always" fails at the first attempt - reboot - working... MS sucks!
My test-machine (also Win10 1909) with only one NIC can copy to all shares without a problem.
Maybe Win10 has a problem with 2 NICs like in my case or it is really a driver problem of the Asus XG-C100C... i don't know...
But the most annoing problem still persist: I cant copy files to the root folders of my shares "Movie, TV-Serien and Cache" - what the hell is this???
Attached is a screen of a copy process (20GB) in German (sorry ;-))
Win10 copied 32% (~7GB) and then stopped (0 Bytes/s)...