The device definitions were defined in the Device Definitions category in Device Management, similiarly Device Rules were defined in the Device Definition category in Device Management.
Device definitions were defined as follows Bus type and CD/DVD drives were chosen as the selected parameters. Only USB was selected in the Bus type parameter.
Device Definitions were defined as follows. Step 1: The device definition rules from above was included.
Step 2: Block (online\offline); Monitor (online\offline) and Notify user (online\offline) were selected.
Step 3: Was left blank initally with just the privileged user set up by user account. The drives were not being blocked. A User Assignment group was then set up and used, it was set up by group as defined by Active Directory.