To read data from a floppy disk to a virtual machine, you must create a disk image that the virtual machine can recognize.
Some operating systems require you to use floppy disks to install them. Because the Mac does not include a physical floppy drive, and because Fusion supports floppy images only, you must use a USB floppy drive to create floppy images.
The Apple Disk Utility can create floppy disk images for this purpose.
To attach the images to a virtual machine, see Connect and Set Up a Floppy Device.