I think that I have a fix. after finding these on the forum:
http://community.wd.com/t5/WD-My-Cloud/SMB-Problem-please-i-m-desperate/td-p/876376
http://community.wd.com/t5/WD-My-Cloud/SMB-Permission-problem-with-new-firmware-update/td-p/694190
I had a look at the file /etc/samba/overall_share and found that not all users specified were appearing in appropriate shares, even though they were selected and displayed on the dashboard web-page.
Example section from/etc/samba/overall_share
BEGIN ## sharename = x#
path = /shares/x
comment =
invalid users =
valid users = <a, b, c …>
read list =
write list = <a, b, c …>
writeable = yes
map read only = no
END
I edited the ‘valid users’ & ‘write list’ sections, rebooted and … can now see all shares (at least for now), hopefully this will have done the trick
