Re: It's how big?
Havent' all very large cards been using exFAT for a while now (despite the name, a very different and more capable file system).
Yeah, that's because the camera, phone and memory-card makers were all too cowardly to go for something not-patent-encumbered like EXT4 (or some other open-sourced FS). All it takes is a simple installable-filesystem driver (even in MSWin) to make the system recognize ANYTHING formatted in it. Cowards the lot of them.