Larry, I thought I would report that the f s challenge error appeared as it usually does when using power move with an audible file, but this time it wiped all files off my BookPort. the disaster is I had one that I had thoroughly marked up for use to grab text for a power point presentation I was preparing for a client this week! YIKES!! But, no matter, I still love the thing, I just really hope you guys can figure out this f s challenge error that tells me the files aren't formatted for my BookPort. After it first appeared and before took them all away, I tried to read my book by pressing 2 as I normally do. I got one instance of an error message saying i/o error, then no files. I confirmed that they are gone when connecting BookPort to my PC. As I write this, I am resending the book. The other file can be recreated, I just have to sit down and do it. Anyway, thought you or somebody at APH would like to know that this happened. Marlaina Lieberg