SmartDisk FCD20 FotoChute 20 GB Portable Digital Storage Device Can operate as a master or slave device, when connected to your camera or PC Holds over 20,000 photos (when stored in 800Kb file size) Can be connected to flash disks, card readers and other USB devices for selective file copy Works with both Mac and PC - Windows ME, 2000 or XP; Mac OS 9.2, Mac OS X 10.1 or higher Hi-Speed USB 2.0 connection(1.1 compatible) transfers data between camera and computer, or between two computers