HD floppy in DD floppy drive - question

[psxphill]

it's a complete load of rubbish
hd floppies can last as long as dd floppies
in fact there are not technical differences between them ..only a hole
to store the floppies of course a sealed box away from moisture
otherwise they can get fungus like cd and dvds

They are very different technically. Lots of stuff here:
 
http://www.retrotechnology.com/herbs_stuff/guzis.html