No, I've never had this issue... What are the exact steps you take to put the books on the ereader? Do you put them on the ereader directly with your computer's OS, do you use Calibre? Are you sure you eject the ereader before you unplug it? What are the file types you are trying to put onto the ereader? Which file types
do make it onto the reader? Lots of questions, but they might help us understand what's going wrong
