WOW means: in case you have more than one reader (one of which is, of course, a 302), or you have an USB key, try to connect them to your 302 via USB cable, like you would do to with a computer. Surprise! Their files turn up in the
Books menu of your 302 as an external memory (there's also an appropriate icon.
It's not a reader. It's a Swiss knife! Thank you warmly to the developers