Yep, it is not like eBooks take up much space, and PDFs suck on eInk devices so not much need to have them loaded in great numbers. An SDCard on a tablet is a good thing, but overkill on an eInk. If you popped a 32GB card into a Kindle, it would hold more books than anyone could possibly read in a lifetime, or at the very least, the lifetime of the Kindle. Not sure why some people think they need thousands of books on a Kindle. If they use those documents for research, then a Kindle is the worst choice for that, they need a tablet or computer. Loading thousands of books on a Kindle is just asking for trouble, trouble named "indexing".