smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-135-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

/dev/sdg: Unknown USB bridge [0x8564:0x4000 (0x037)]
Please specify device type with the -d option.

Use smartctl -h to get a usage summary