You should have had an 8mb SD card which was provided with the kn7 when purchased new. These are available quite cheaply now and this is different from the smartcard. Your local computer store should have one.
The initial data disk puts the keyboard back to its original factory setting, so if you have anything saved that you wish to keep put it on your SD card or a HD disk first.
The time you should use this is if you are problems with the keyboard or you wish to edit sounds etc. from scratch but always save your work first. You can also initialise the keyboard from within the program menu. You will find that there are lots of technic-phobes on this forum who will give you excellent advice.
The keyboard you have bought is the best, enjoy it!
[This message has been edited by firstname.lastname@example.org (edited 06-05-2005).]