How to monitor USB drive activity with application device rule

Hello,

I would like to setup rule to monitor (log only) USB drive usage on Windows machines with SEP 12.1.6 MP5 clients. I've added a rule to Application and Device Control policy/ Application Control with Process Match: * and Only match processes running from the following device types: Removable Drive. Conditions added to the rule are:

File and Folder Access Attempts and Launch Process Attemtps.

The rule doesn't seem to be working as there is nothing in the logs for Application and Device Control / Application Control.

What am I missing?

Thanks

Alex