[chumbo]

Hi,
I'm very new to the Kindle and Calibre so I'm really hoping I'm just missing something really obvious here because what I'm trying to do is so basic!

I'm just trying to transfer various ebooks (pdf, epub, mobi & azw3) with Calibre but none of the books I've tried to transfer - and convert when prompted by Calibre - show up on the Kindle Paperwhite 3??

I can see them on the Kindle when connected via USB but when I unplug and open the KIndle...nothing, nada??!
Why, what...help!? :-(

Thanks,
Chumbo