I'm using a bunch of college textbooks at the moment that are on PDF. Most of them are under 200, but a few are under 300. I've been trying to break them up into smaller volumes, but it ends up increasing the size of each file so the parts end up even bigger than the first whole one was. I just like to keep everything under one roof as it were. The nice thing about Evernote of course is all the files are then accessible from anywhere: my desktop computer, ipad, iphone, and I can send them or share the files easily. I do love Evernote. Every time I explain to people how useful it is their eyes glaze over, though. But I use it for so many things from taxes to voice memos and books.