RMPrepUSB works for Windows users. It allows them to easily and quickly create their own multiboot USB drive. It also allows users to quickly test, partition, format, install a boot manager, or extract/copy files and test a multiboot USB bootable drive. It also can make or restore an image.
RMPrepUSB is a software that is specifically designed to help users create and manage a multiboot USB drive. Their website contains a wealth of knowledge on how to get started and use the software including many video tutorials. The software can be used to format any USB storage device or USB hard disk as a bootable device. Does not work on USB Floppy drives. You can also partition drives and it works on non-USB drives.
Only other utilities like YUMI or XBOOT, RMPrepUSB supports every different ISO or image
The website also has a bug report page that allows users to report bugs and see when those bugs are fixed. The latest release of RMPrepUSB was on January 13, 2018 (v2.1.740). The latest full release of RMPrepUSB was on December 17, 2013. The latest stable release was before February of 2017.
Perhaps one of the cores user features is putting an operating system on an external portable drive and making it readable and bootable by Windows. Thus you can have different versions of Windows or some the have personal configurations that you can plug and play into other Widows supported machines.