If you wish to prevent sharing of a particular USB device, you can add it to the Exclusion List. It helps to exclude particular devices from sharing when using USB Redirector RDP Edition in auto-sharing mode. You can also use Device Policy for this purpose.
Important! We recommend to add your USB Keyboard and USB Mouse to exclusions to prevent accidental sharing. Otherwise they will become unusable if shared.
If USB Redirector RDP Edition is in auto-sharing mode and you stop sharing a USB device, the device will be added to Exclusion List automatically.
Follow steps in the picture below to add a USB device to Exclusion List:

Alternatively, you can use right-click menu or select menu Exclusion List > Add USB Device to Exclusion List.