I was able to setup the nas and migrate data to it at decent speed - in the area of 60MBps.
At this moment I am able to access the files individualy, no problem. I even left the nas couple of days to digest new files… I was also able to perform backup on the external USB drive.
But - if I try to copy, move, delete a folder with more than 10 files to any of my computers… I get network error 0x8007003B and the operation has to be aborted.
There is no network issue or client OS issue as I was able to transfer the files to the wd nas from the same machine I have problems now. I am also able to use another NAS (a freenas box) with no problems at all (connected to the same switch).
I already disabled the antivirus software. No change.
The router can not be the cause as I can normaly work with another NAS in
the same network, I was also able to dump the data to the WD NAS over the
network.