how to see usb devices on ubuntu code example

Example 1: list all ssh connections ubuntu

ss | grep -i ssh

Example 2: list all hard drives linux

user@system:~$ df -h
 Filesystem      Size   Used  Avail  Use%  Mounted on
 udev             7.8G     0   7.8G    0%  /dev
 tmpfs            1.6G   3.5M   1.6G    1%  /run
 /dev/sda2        468G   204G   242G   46%  /
 tmpfs            7.8G   109M   7.7G    2%  /dev/shm
 tmpfs            5.0M   4.0K   5.0M    1%  /run/lock
 tmpfs            7.8G     0   7.8G    0%  /sys/fs/cgroup
 /dev/loop0       7.5M   7.5M    0  100%  /snap/canonical-livepatch/54
 /dev/loop1       90M    90M     0  100%  /snap/core/6034
 /dev/loop2       5.0M   5.0M    0  100%  /snap/canonical-livepatch/50
 /dev/loop4       90M    90M     0  100%  /snap/core/6130
 /dev/loop3       4.8M   4.8M    0  100%  /snap/canonical-livepatch/49
 /dev/loop5       89M    89M     0  100%  /snap/core/5897
 /dev/sda1        511M   6.1M   505M   2%  /boot/efi
 tmpfs            1.6G    16K   1.6G    1%  /run/user/121
 tmpfs            1.6G    44K   1.6G    1%  /run/user/1000