I'm running Kubuntu 20.04, and I'm trying to create a USB stick for installing Windows. I have the Windows image I need to put on the stick -- no problem there. But I've been thwarted at every turn.
My first thought was to use Startup Disk Creator, but that only works for Linux images. Next I tried Woeusb, but it's no longer maintained and I couldn't get it to run. So I turned to Unetbootin, but I couldn't get it to accept my USB drive. I tried it with a single FAT partition on the USB drive (what could be more vanilla?), both empty and nonempty. I also tried using gparted to fix the USB drive, but it wouldn't recognize the USB drive either. So I'm out of ideas.
mkusbworks with all current versions and flavours of Ubuntu and can create USB boot drives from various Linux iso files as well as Windows installers for all current versions of Windows (8, 10, 11) that can boot both in UEFI mode and BIOS mode (alias legacy mode).