New digital camera owner. Want to backup photos to CD. I've compared my photo's to those that are done professionally (Truprint). Professional CD files are average 600kb, mine are also 600kb. Properties of the CD say size is 103mb, it contains 120 of these photos at this resolution, plus the same photos again at lower resolution in another folder, plus viewer etc .exe files. I thought that a cd had a capacity of around 7.5mb, so I'll only be able to get around 15 photo's on a cd. What have I got wrong? How do I save a lot of photo's on one CD in a conventional jpeg format without losing resolution?