save to floppy disk very long time

Dear everyone

My company used Symantec Endpoint 12.1.5337.5000 and have applied Application and device Control

If I applied rules "Application and Device Control" then save / open file to Floppy Disk very long time ( around 15 - 30 min )

Otherwise, Save /Open very fast ( < 01 min )

Please help me show to me which the root cause , I can not applied this rules because it's became higher risk when user plug their USB drive to computer.

Thanks/phamduyus