When I insert my SD Compactflash cards 128MB, 256Mb 4GB or 8 GB cards in my canon powershot a40 camera, the following msg appears: CF card full even though they are not half full. This is a new problem for me. If I insert original canon FC 8M card provided with camera, it will accept new photos when I shoot.
First try formatting the cards in the camera to see if that corrects the problem (note that this will also erase the cards). If that doesn't work, remove the cards and look inside the card slot for a bent pin. If you do see one, don't fret as you can likely unbend it with the procedure shown in this link.
Same problem but with a different camera. Turns out, these cameras are very... may I emphasize very... picky as to which cards to use. Try other off-brands and you'll be surprised as to what it takes.
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Up until today, a never had any problems using SD CompactFlash cards 128MB, 256MB 4GB or 8GB with my canaon powershot a40 camera. That is what I meant when I stated it's a new problem for me. What intrigues me is that I can use my original 8M card but no longer my other Sandisk cards.
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