I don’t know. In my country no gas can be paid unless the nozzle has been placed back. The machine registers as “still pumping”, and the gas station attendant sees this and cannot process the payment. Why you would do this any other way baffles my mind.
Depends on data density. Still got a c64 with a whole box of 5 1/4" floppy disks. Last time I checked every one I tried worked fine, and they were written about 33 years ago.