Panasonic CF-18 Series Reference Manual page 73

USB Devices
73
Use the write-protect tab (A).
This is a must for preserving important data. This prevents your data from being erased
or overwritten.
The USB floppy disk drive cannot be used at the same time as other floppy disk drives.
Do not directly open application files (e.g., Microsoft Word, Microsoft Excel) which are
stored on the floppy disk.
First copy the files to the hard disk, then open the copied files from the hard disk.