happy that this birthday I have received a gift, kindle fire, but totally I am a bookworm so the memory storage is not enough for me. However that will be really frustrating if I need to drop the old books and add new one, I am looking for a means to backup my books on other places.(the books are said drm protected), what should I do with this?
Welcome to the forum. (We even answer questions that have absolutely nothing to do with avast! :))
This should answer your question:
http://goo.gl/4RlVp