I bought an ebook from Amazon and sent it to the "kindle" app on my android phone.
Later I decided to read it on a bigger screen (Paperwhite), I thought I would be able to connect the phone via usb and copy the azw3 file... wrong! The kindle app has a folder named after the book's ASIN, with KFX and other files in it.
Is there any way to use that book to the Paperwhite somehow or did I just throw my money in the trash?