I had between 160 and 170 photos on my photopass cards. Multiply that by 2 for pics on the disk since I added borders or overlays or signatures to just about every one. We asked for a picture most times when we saw a photographer (but still didn't manage to get one in front of the castle - we were always rushing to the rides in the morning and never got back to Main Street), and also had pics taken with the characters. We had a lot because I have a few children and sometimes they posed wtih the characters individually. My disk was $106 well spent. When I was having my disk made, the CM told me they hold over 400 pics, but less than 500 - she wasn't sure of the exact number. If you have more pictures than that, you can buy 2 disks. Also, you can combine photopass cards. I think I had 7 or 8 of them by the end of our trip, because there were some times when DD wasn't with me and got her picture taken and got a new card, plus sometimes the photographers give you a new card without asking if you already have one. Just give the CM all of the cards when you have your disk made and they'll put all the pictures on one disk, regardless of the number of cards.