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Old Dec 18, 2006, 8:14 AM   #8
JimC
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Join Date: Jun 2003
Location: Savannah, GA (USA)
Posts: 22,378
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When you format a card, you're not overwriting all of the data on it. That's why a format is relatively fast.

Otherwise, it would take a very long time (just like trying to fill up a card with images, you'd be limited to the write speed to media). ;-)

A format is simply recreating the FAT (File Allocation Table), and it's unlikely that it's going to make much difference in card life compared to deleting the files.

I haven't had a problem with a card doing it yet (and I've been reformatting my memory cards prior to every use for years using a camera's menus for format).

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