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Konablue wrote:
By the way, are you guys reformatting your cards in the camera after they are downloaded and backed up? If not you should be. I never use the delete option to wipe a card clean, instead I just reformat in camera everytime I need to refresh the card. But don't use the camera's format feature to view available card space. I learned the hard way that it's a dangerous habit.
Its a bit complex.
Reformatting SD cards in the camera is exactly the same as a quick format in your computer. It merely changes the fat table(s) to show that the files are available to overwrite. Doing this with a SD card works fine, but when it comes time to record over the existing files, the write process is suddenly much slower than with a new or blank SD card because the sectors must first be erased. Those who pay a lot for a super fast SD card are losing most of that speed after the card is filled and formatted in camera.
You can regain the speed by doing a low level format (easiest to do in Camera). The down side is that card life is substantially reduced if you do low level formats frequently.
CF cards don't have the issue. I use a very large SD card so that it does not fill so often and does not require frequent low level formatting.
Its best to use a high capacity SD card, let it get full or nearly full of images and then do a low level format. You will then always have the high card speed you paid for.
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