Thanks, Yes, that provides very similar info to the link i posted and all that has been checked, as it was previously , when on Win 1909, where everything worked perfectly.
It only stopped working after Win 10Pro 2004 update. I do not use, and never have used, a MS account login. I always use an offline account to log into windows.
Please confirm that WD have checked internally that access to the public drive is still possible with Win 10 Pro 2004 without any additional changes , or advise any additional steps that need to be made to resolve this issue.