Delete all partitions from your USB drive using disks and copy your device location. In this instance I have /dev/sdd
Right-click on the ventoy tar.gz and select extract here.
Open the readme file inside the extracted ventoy folder which will show the commands and options.
Right click inside the Ventoy folder and select open in terminal
sudo sh Ventoy2Disk.sh -i /dev/xxx
sudo sh Ventoy2Disk.sh -i -s /dev/xxx if you have secure boot enabled
Replace xxx with your noted id from disks earlier.
Type y and hit return and again to confirm
The script will automatically create and format the drive partitions
Copy and paste folders or individual files to your Ventoy drive.