I love my Sandisk cards. I also have a 4.0GB Sandisk Extreme card and made an interesting comparison. Here in my living room I'm racing the recording time between Ultra and Extreme. When writing a large buffer filled with photos, the capture time was the same on multiple attempts. The more expensive Extreme was no faster than this card. In my case, the writing speed has to be limited by my Nikon 8800 camera. A reliable card up to 8.0 GB is very useful. My cards have traveled through Alaska, Mexico and Ecuador and have had to work in a wide variety of conditions. They took over 100,000 photos, and I really didn't want to lose every single one of them. I back them up as often as I can, but I still worry and have lost photos when other cards have failed. I am happy to report that I have never lost photos from a Sandisk card despite being mistreated. Last week I filled my Sandisk Ultra II 8.0 GB with important photos - carefully staged photos of butterfly specimens from the California Academy of Sciences. I worked on this project 12 hours a day for 8 days. The card behaved as usual, and each of the 2,400 photos I took made it home safely. Backup your cards often, but from experience I can say that I have a very, very good impression of this card.
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