Because many small shops purchase a limited number of software licenses and the PLC technicians have to share them. With a floppy, the license can be transferred to one computer and the floppy from which the license was transferred can still be used in other machines. Also, many customers still require the PLC program to be provided on a floppy disk as well. That allows both the customer and the vendor to quickly and easily store any program updates without having to burn a new CD. For my shop, almost all of our customers require all programs drawings to be provided on a CD as well as the program to be provided on a floppy disk. Only a few will use USB flash drives. But I'm getting off-topic. My point is that there is still a demand for floppy disk storage. Everyone will be forced to change now, though, since Sony will end production of floppy disks this March. I have no problem with keeping up with the times... but, in the last five years, I've had more USB flash drives fail (ones that were shared, updated frequently, and stored near the PLC) than I've had floppies fail.