What are EPUB, MOBI, PDF considered? They all belong to books that use ereader software. Are they considered data or media? I think of them as media. I'm trying to set up a folder in 6.0 where I want it on the ext sd card. The app seems to be showing picture folders only. I consider books to be part of media - not just music and videos. If these files are considered data, then I know it won't work and I'll have to file in the sd memory on the phone.