Thank Geoff! with usb3 disk plugged to lenovo running buster
i see msg below, but i'm not sure if usb3 is used
May 31 10:21:18 debian kernel: [13385.174292] usb 5-6: new high-speed USB device number 12 using ehci-pci
May 31 10:21:18 debian kernel: [13385.331455] usb 5-6: New USB device found, idVendor=0781, idProduct=5591, bcdDevice= 1.00
May 31 10:21:18 debian kernel: [13385.331459] usb 5-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
May 31 10:21:18 debian kernel: [13385.331461] usb 5-6: Product: SanDisk 3.2Gen1
May 31 10:21:18 debian kernel: [13385.331463] usb 5-6: Manufacturer: USB
May 31 10:21:18 debian kernel: [13385.331465] usb 5-6: SerialNumber: 01010726504b6423940942c89716195fcf82e07a8b871127b1e65360cf8bb85335c600000000000000000000e0bd07b9ff893100915581073caae2e3
May 31 10:21:18 debian kernel: [13385.331885] usb-storage 5-6:1.0: USB Mass Storage device detected
May 31 10:21:18 debian kernel: [13385.332549] scsi host4: usb-storage 5-6:1.0
May 31 10:21:19 debian kernel: [13386.359351] scsi 4:0:0:0: Direct-Access USB SanDisk 3.2Gen1 1.00 PQ: 0 ANSI: 6
May 31 10:21:19 debian kernel: [13386.359741] sd 4:0:0:0: Attached scsi generic sg1 type 0
May 31 10:21:19 debian kernel: [13386.361717] sd 4:0:0:0: [sdb] 60088320 512-byte logical blocks: (30.8 GB/28.7 GiB)
May 31 10:21:19 debian kernel: [13386.364470] sd 4:0:0:0: [sdb] Write Protect is off
May 31 10:21:19 debian kernel: [13386.364473] sd 4:0:0:0: [sdb] Mode Sense: 43 00 00 00
May 31 10:21:19 debian kernel: [13386.365459] sd 4:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
May 31 10:21:19 debian kernel: [13386.381477] sdb: sdb1 sdb2
May 31 10:21:19 debian kernel: [13386.385084] sd 4:0:0:0: [sdb] Attached SCSI removable disk