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I have a Canon EOS 550D and cannot get two different memory cards to work. The first one is SanDisk Extreeme, microSDXC 1, 64 GB and the second is a Verbatim SDHC class 4, 8GB. The situation with the SanDisk memory cards is that the camera recognises it and I was able to take a few photos (30 max). Afterwards I get the err 02 ( Card cannot be accessed. Reinsert/change card or format card with camera.)

Regarding Verbatim SDHC, the camera does not even recognise there is a card present in the memory slot. Interestingly, It works with a microSDHC class 4, 8 GB card from a different brand.

Does anyone have any suggestions how I can make those cards work with my camera?

  • Where are you getting your cards? There are probably more counterfeit Sandisk cards than genuine ones in the wild. If they didn't come from a reliable source, you might not be using what the label says you are using. – Michael C Mar 1 at 2:30
  • My two cents and well-intentioned advice: Get rid of these memory cards ad buy some new original standard sized SD cards. If your SD cards doesnt work properly than you have always the trouble of loosing photos or being not able to take some. There is nothing good about save some bugs on memory cards (besides normal sales discount), because these are the elements that brings home the photos. Btw. the last information I had was that there are tools to check if the sd card is valid and original or a counterfeit. But I doesnt remember the name, so google will have answers. – Horitsu Mar 1 at 6:30
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For the one that's recognized, format it in the camera after moving all the photos to safe storage (e.g. flash drive or PC). If it does not work correctly after formatting, perhaps the card is defective or contacts in the camera to the card are loose or broken.

As for the 8 GB card, it may be too slow (class 4) or too small to use in the camera. Try formatting it as FAT on a PC. If that fails, the card is bad.

  • How can I diagnose if the camera`s card slot is damaged? – Ivan Yankov Feb 28 at 23:33
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    1. Look inside - the thin gold-plated wires are easily bent. 2. Try using another card - if it works, the connectors are probably OK. – DrMoishe Pippik Feb 28 at 23:57
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Does anyone have any suggestions how I can make those cards work with my camera?

  1. Make sure the camera is not broken or otherwise at fault.

    • Other cards working makes it less likely your camera is broken.
  2. Make sure you are not using a broken microSD-SD adapter.

  3. Check the integrity of the filesystem with chkdsk or fsck, or whatever program your computer uses.

    • You can format the cards in-camera, but I've never had an issue with in-camera vs computer formatted cards. I consider the "difference" to be an urban legend that originated with buggy firmware or tech support practices. I've never had a card truly fail in camera that did not also ultimately fail to work on any other device.

    • In the future: Unmount or "eject" the card before unplugging it from your computer. Make sure your camera is completely off before removing cards.

  4. Consider returning the cards to the manufacturers for replacement. They may be on the verge of complete failure. SanDisk has lifetime and 10-year warranties on most of their memory cards. I don't know about Verbatim.

    • If the manufacturer refuses to replace the cards: Prices that are too good to be true are too good to be true. Don't buy memory cards from auction sites.

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