/dev/sda smartctl 7.2 2020-12-30 r5155 [armv7l-linux-5.10.17-v7+] (local build) Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org /dev/sda: Unknown USB bridge [0x03f0:0xb140 (0x2206)] Please specify device type with the -d option. Use smartctl -h to get a usage summary /dev/sdb smartctl 7.2 2020-12-30 r5155 [armv7l-linux-5.10.17-v7+] (local build) Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org /dev/sdb: Unknown USB bridge [0x03f0:0xb140 (0x2206)] Please specify device type with the -d option. Use smartctl -h to get a usage summary