written by Pete Batard, this neat tool helps you create bootable USB drives of various types of operating systems. It supports .img and .iso source files just to name a few.
The software is free & open-source and can be downloaded from https://rufus.ie/
At Danskoya.com, we utilize Rufus to create & maintain bootdisks for Windows 10 and FreeBSD. It has proven to be very valuable for all our hardware/software deployments.