Clip+ Memory Card Issues Again

You are making this complicated. I assume you have copies of all the files that are on your players and on your memory cards also on your pc(if not, then copy them to your pc). Connect the player to the pc and delete all the files on the card. Disconnect the player, and set the player to msc. Format the player using the player menu. Do this for all your players. Next connect a player and load up the main memory and the card. Do that for all your players. Now your problems should be over.