1.3.1.2 New Device Sequence
The client uses the new device sequence to notify the server about a new device. It first notifies the server to create a new instance of the USB Redirection virtual channel. Once the new virtual channel is created, a new device message is sent to the server via the new virtual channel. The device is recognized based on the HardwareIds field of Add device message (section 2.2.4.2).

Figure 3: New device sequence