Another partition on the same USB

[hallergard]

Hope I may ask one more question (not a problem). I have learnt that Windows can only recognize one partition on removable media. But WinToUSB can create 2 partitions.  When I shrunk my Windows 10 installation to create space for cloning a Linux Kubuntu partition onto the same flash drive, I was later able to mount Kubuntu from Windows 10, (see end of https://youtu.be/l9MFxbUI_9Q ) Pls explain!