I learned how to detect and mount the USB disks on commands.
How to list up the not mounted USB disks.
The 2 commands below are useful.
$ lsblk -r -p -o NAME,TYPE,FSTYPE,UUID,SIZE,LABEL | grep -v "^/dev/loop" NAME TYPE FSTYPE UUID SIZE LABEL /dev/sda disk 232.9G /dev/sda1 part vfat XXXX-XXXX 232.9G ...
$ gio mount -l Drive(0): WD_BLACK SN750 2TB Type: GProxyDrive (GProxyVolumeMonitorUDisks2) Drive(1): USB DISK 3.2 Type: GProxyDrive (GProxyVolumeMonitorUDisks2) Volume(0): 250 GB Volume Type: GProxyVolume (GProxyVolumeMonitorUDisks2)
How to mount a disk
$ udisksctl mount -b /dev/sda1 Mounted /dev/sda1 at /run/media/jaruga/XXXX-XXXX