Any way to change "guest" access to shared folders to read only?

The default shared folders I want to protect and not accidentally delete content, so I would prefer that all non-admins have read only access to these files.  is there a way to do this?  I have a MBP, if that matters.

TIA!

also, what is odd is that i cannot see “guest” as a user in the basic/user page.  I only see admin and wd_backup, which i set up yesterday.  That being said, I dont recall it then either.  Yet, i still can connect as a guest.  Is this expected???

Since there’s been no replies, maybe you should try contacting WD’s Technical Support about this. You can do so either by phone or email.

To Contact WD for Technical Support
http://support.wdc.com/contact/index.asp?lang=en