How can I transfer a picture from my MAC to a USB drive and be able to print it on a Windows machine. I have several pictures I want to make into a book at my local Walgreens Photo Kiosk. Unfortunately their machine is windows based so when I download the pictures onto my USB drive and take them to the photo Kiosk I can not see the actual photo just an image of a "flower". I've used the disc utility to format the USB drive for FAT32 but the results are the same. What am I missing?