Hello, Just like a desktop computer, our units employ hard drives. We know that these drives have limited lives. When such a drive fails in a computer, it causes major problems, but we can install a new one. This is not so on our PDA'S. Now we'll have more uses for this drive because of the new features we have. The drives consume a considerable amount of power. Adding this up, wouldn't it be best to copy our audio file or files to the SAID card and run the from there. We can keep them on the hard drive if necessary. Wouldn't this action possibly improve the performance of our book reading at high speeds? Let's hope that, like the hard drive, our place in a book would be maintained after leaving it in order to perform some other task? Joe G.