Had some issues moving ebooks to the unit &, I think, the USB must have been unplugged prematurely 'cause the picture & video folders are empty. There is a "LOST.DIR folder now with a bunch of numbered entries. I don't care about the stock pictures, but am concerned about this happening again. Anything I should watch out for? I also have several books that show up twice in the bookcase. I can click on any of them & open the book, but they don't show up in the manage library utility.cheers,kev