In the middle section of the interface, check the box next to the type of OS you want to add:

7-Zip is open-source software with no trial periods or forced subscriptions.

You do not need to format the drive every time. To add another OS later, simply open the program, select the same USB drive, choose the new ISO, and click Go .

For Linux distros or recovery tools like Hiren's BootCD. 4. Create the Bootable Drive

To help you get started, this guide provides a complete overview of the software, how to extract it using the free 7-Zip utility, and step-by-step instructions for creating your own multiboot drive. What is WinSetupFromUSB?