Floppy disks are recording media in which magnetically coated or vapor-deposited disks are placed in a protective case, but they are rarely used in modern times when HDDs and SSDs are widespread. A ...
You'll need to use a disk image. Try using Disk Utility to make a 1440 KB disk image with no partition map and a FAT filesystem. Mount the disk image and copy your stuff onto it. Then use dd from the ...