Sony PCG-FXA59 User Manual page 106

Troubleshooting Drives, PC Cards and Peripheral Devices
My floppy disk drive cannot write to a floppy disk.
Check that the floppy disk drive is properly inserted into the multipurpose bay. See

for more details.
 If the floppy disk is write-protected, disable the write-protect feature or use a floppy disk that is not
write-protected.
To reinsert the floppy disk drive
Page 106