Vitux published a tutorial about how to manually mount or UnMount a USB device on Ubuntu Linux

How to Manually Mount/UnMount a USB Device on Ubuntu 20.04 and 22.04

When you connect a USB drive to our system, it is usually mounted automatically and a directory with your user name is created under the media folder. You can also access it through your system’s file manager. 

How to Manually Mount/UnMount a USB Device on Ubuntu 20.04 and 22.04 – VITUX