I'm as confused as twobob.
Here is the link to the support pages for all Kindles. Click the one that looks like yours (don't forget to click the links to the side to see the discontinued but still used Kindles). If yours doesn't match you may not have a Kindle (Kindle is sometimes used as a generic term for all e-ink readers - like Kleenex for tissue). Could you have another device that uses a micro SD card?
http://www.amazon.com/gp/help/custom...deId=200127470