It would only format to FAT 16, so you'd only end up with half the capacity. And, we have not tested it with 4 gigs, so we can't comfortably support using it. Save your money and go with 2 gigs. Pamela >>> srobertson4@xxxxxxxxx 04/14/05 12:06PM >>> If you bought a 4 gb card that has fat32 instead of fat16 could this card be formated in the book port and would it then work? Thanks. Steve ----- Original Message ----- From: "ROB MEREDITH" <rmeredith@xxxxxxx> To: <bookport@xxxxxxxxxxxxx> Sent: Thursday, April 14, 2005 8:16 AM Subject: [bookport] Re: compact flash card sizes > 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? > >