What is the device instance path value?
I have successfully block similar Ricoh SD controller in the past on a Dell laptop.
Usually, when you connect a card reader, there are several events in dlp. They should be close to the manager incidents. Try to block other devices, such as the controller or reader itself.
As I noted, blocking devices - it's a lottery: you're lucky, no luck. Normal and 100% working version for this dlp I do not know.
I can offer this option yet. Enable Rule PnP to monitor all devices. Then divide them: the first - not the monitor, the latter - are blocked, and others - are monitored. But block controllers on computers, as opposed to laptops is very dangerous - when locking the controller computer blue screen of death. Treatment - enter in safe mode and update the computer policy, removing the lock from the controller.