I transferred all but a few journals over to my SD card and it did free up some space, but it is still limited. Is the best way then to keep all your books and other documents on the SD card and then only transfer them over when needed? What about maintaining all of the annotations I have made? I know for a PDF that if I don't export, it will only go over without the annotations. What about books? Anyone know? I try to clean up my apps frequently as well. So any that I find I am not using at all I have gotten rid of.