you can also use regular directory mount command with
-t floppy parameter. it will mount a part of your actual hard drive as a floppy drive, where you can then copy whatever you want to have on the virtual floppy
that way the files probably will stay saved in the directory..
another option is to use something like
this. i actually use it often with dosbox, as dosbox natively doesn't support mounting of multiple floppy images at the same time (because of dosraider :P) and some games need to swap various floppies during the game's runtime