wma files and how to read micro disk

Audio books are coming from the library.  I tried to drag them onto the micro disk in my player but I couldn’t see it when it is in the player.  I put it in my laptop and copied the file that way.  I do have the 2GB device and yes it is the e250r.  I did read the manual but when I select rapsody mode it just goes back to the previous menu.  there is no USB mode on my device.  So I have not been able to figure out how to see the micro disk either from the device or from my laptop, when it is connected. 

I also tried to copy the files directly to the device and got a message that the device did not support the wma format.

does that help?

thanks for the reply!