How to copy file from one usb to another usb using rsyc in terminal?

I need to rsync almost identical files from one usb to another. There are about say 20 yellow folders in both roughly. One has more files/folders than the other one . Do I need to rsync individually each yellow folder or is this done in one go? Is there a command that can rsync in one swoop all yellow folders and anything else?

The name of one usb is KINGSTON in capitals and the other is is something like ADC123. Using rysnc what commands do I type? Thanks in advance.