Deny delete of files and folders within private shared folder created in mybooklive

Hi,

I have created a shared private folder in mybooklive 3TB NAS and have given user ‘test’ full control rather than readonly (as there are only two of these options available for shared private folder).

How can I set up so user ‘test’ can have all controls except delete of files and folders within this shared private folder. 

Your kind advice is very much appreciated.

Justin

You cannot, the only options is either full access or RO, at least via the Dashboard.