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 [0x067b:0x2731 (0x100)] Please specify device type with the -d option. Use smartctl -h to get a usage summary