Originally Posted by delphidb96
Does the .mbp (.mpb?) file store the last known position in the ebook? I *think* it does, because if I erase it, the ebook opens to the first page. But if so, isn't that the same file used to store the font family to use on the ebook? In which case, the SD card isn't corrupted/read-protected because then NONE of that information would be saved.
The font family and size is a global choice so it is most probably stored on the internal disk. Maybe it is stored in the .fonts.cache-1 file.