In AGX Xavier Quick Start Guide there is a caution:
CAUTION: ALWAYS CONNECT ALL EXTERNAL PERIPHERAL DEVICES BEFORE CONNECTING THE POWER SUPPLY TO THE AC POWER ADAPTER. Connecting a device while powered on may damage the developer kit or peripheral device. The developer kit should be powered down and disconnected from the power supply before plugging or unplugging devices or add-on modules, or connecting to the headers. (Wait for the white power LED to turn off.) This includes the camera connector, M.2 connectors, PCIe connector, and any headers.
According to this caution, should I plug in any usb device when device is powered off for each time?