DLP 9.3 integrated with EPO 5.1 and deployed DLP agent on the systems.
Referred the KB78585 and tried to block USB drives but no success as files are getting copied in Pendrive...any suggestion.
Ok it looks ok.
Are you using user assigment or computer assigment?
If you using user assigment to who are you applying the rule?
From the McAfee download site, you can download the diagnòstic tool for HDLP.
You can run it and see if the policy has been applied. The diagnòstic tool is your best friend with HDLP.
It seems there must be a problem with the way you are applying the policy.
Just to make sure, the correct steps are :-
Goto policy catalog--> Select DLP policies--> duplicate "McAfee default Computer Assignment Group"
In the new policy created, select your rule, and select "logged in Users" or/and "local users" as required.
Now assign this policy to the required machine.