I have been using Audirvana for a number of years (have used the PC as my front end), have finally just purchased A Zen MK2, so have to learn the new App. Anyway, all my Flac./DSD albums are kept in the "My Music" folder, + Nas and portable hd back ups. if I cannot remember my login details, and password for the PC, for importing them, How do I copy them to the internal storage on the Zen. Silly question, but just want to be prepared in advance. Also is transferring them via USB stick (got a new one coming today) better, quality wise?