When my Paperwhite was my only reader I sent some books to Amazon to see how it worked, but I did not like the fact that I had books with inferior characteristics compared to books bought from Amazon. And after all, I did not need to synchronize, my books are in calibre and in a USB key for eventual problems.
Then I tried to understand how to have the hyphenation and ligatures on my books bought elsewhere and I discovered a couple of calibre plugins including the one for the output kfx for which I thank Jhowell.
