I have the original no-wifi cheap kobo, it only has free content on it.
I connected it the PC and and simply copied epub and pdf to it using calibre. It comes with 100 free books that you can erase, none of the memory is reserved (except for the OS)
ePub works perfectly.
pdf is a little limited in range of zoom, for technical books I convert to epub with calibre and download that.
The only downside of the Kobo - it takes a long time to boot up if it has fully shutdown. Then once it has started it takes a long time to open books.
I connected it the PC and and simply copied epub and pdf to it using calibre. It comes with 100 free books that you can erase, none of the memory is reserved (except for the OS)
ePub works perfectly.
pdf is a little limited in range of zoom, for technical books I convert to epub with calibre and download that.
The only downside of the Kobo - it takes a long time to boot up if it has fully shutdown. Then once it has started it takes a long time to open books.