Depending on your operating system, if you install the software for it (as dictated by HD user manual) when you plug in the drive it will be auto detected by your PC. It will probably be given the next drive sequence letter e.g. E:
You then use it just as you would any other drive connected to the system i.e. floppy; CD
Saving to, and getting info from is exactly the same i.e. copy / save / save as etc; all you have to do is make sure that your pointing to the drive - as you do with a floppy, you make sure it's looking at the A: drive, in this case you would have to look for E: drive.
Hope it makes sense.