by dlharper » 6. Jul 2015, 16:01
ImgBurn does not create floppy disk images. I believe there are programs that will do it, but I don't think any are free (under Windows) and I use a different technique.
Start with a file that is exactly 1,474,560 bytes in size. (You could use a copy of another floppy disk image. I created my first one by building up lines and characters in a text editor.) Give the file a .img extension.
Now open a VM in VirtualBox, making sure that it contains a (virtual) floppy drive. Use something new enough to run Guest Additions, such as one running Windows XP. Select your correctly-sized .img file as the virtual floppy disk for this VM. In the VM's "My Computer", format the floppy disk, making sure "Quick Format" is selected. Your file is now the image of a blank formatted floppy disk.
Now use this VM to copy files between your disk image and elsewhere, such as a GA shared folder on the host.
You may think this sounds long-winded, but it is remarkably easy to do in practice.