I bought a new SanDisk Pixtor 64Gb drive and formatted it in my Panasonic Lumix Camera. I then took photos for 4 days of 200 teenagers on a Pioneer Trek. I took over 2000 photos and 150 video segments. I can see them all on my camera, but I can only see the first 2 days worth on my Mac or my PC (which about half of them). Obviously these photos are very important to these teenagers and I need to get them uploaded so they can view them and we can make movies out of them. What can be done here to save these photos? They assigned me as the official photographer and I need to fulfill my responsibility of showing photos of the entire trip, not just the first half.