Rich: I would stick with 2GB for now. The reason is that 2GB is as high as you can go with the FAT (FAT16) file system, and FAT16 is the preferred file system for the Book Port. FAT32 can be used with limited success, but I wouldn't go there for now. Rob Meredith >>> richcav@xxxxxxxxxxx 04/13/05 06:50PM >>> what is the largest compact flash card size available that can be used on the book port?