Download the image file for the Endless OS version you would like to try.
If you use the GNOME desktop, you can double-click on the img.xz file you downloaded in the file manager, and select Extract. Then launch GNOME Disks, select your USB drive on the left, click the menu on the right and select “Restore Disk Image…”. Select the Endless OS image file and click “Start Restoring”.
If you prefer, you can also write the image to your USB stick on the command line using our eos-write-image script, or zcat | dd.