I didn't find any size information in my sewing machine manual so I contacted Bernina USA. They recommend USB sticks no larger than 2GB! Spent all day Saturday shopping for 2GB USB sticks. One would think I sprouted two heads! All store clerks thought I was crazy - which might be true, but the smallest USB sticks most stores carry are 8GB. Just ordered 5 USB sticks on line (which was all the store I was dealing with had)! Should be in later this week.