[nikos_a]

Also try to access the Public folder on the default settings,still no problem

Just one last inquiry. Inside Public you have 3 folders (if I remember correctly) like Public Videos. Can you try accessing one of these?

If it works, then I may do a factory reset on the WD.

Thanks again for your help.

I tried all of these they are works fine."Publice" "SmartWare", "TimeMachineBackup"..
May be you should be clean the app cache: Luncher--apps find "file explorer",Press "menu" key on remote,select "clean data".
Then try again.

Well, I tried cleaning cache, trying again and again by changing users, changing from Static to DHCP etc. It all comes down to having different versions of WDMyCloud. By the looks of the screens you posted, it looks we have different versions. Apparently, I have WDMyCloud, 4TB with f/w v04.04.04-101. If you think I can help somehow (I am software engineer), please do not hesitate to contact me. See screens below of my WDMyCloud UI and you will spot differences.