Question about Canon PowerShot SD550 / IXUS 750 Digital Camera

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Memory card locked

Just got a canon sd750 last week, working fine and then today it started displaying message 'card locked'. I checked the card and it is not in the lock position. Even tried a different memory card and still saying card locked! Any suggestions?

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  • Anonymous Nov 15, 2007

    card locked

  • sleekzoo Nov 16, 2007

    My camera says my SD card is locked. How do I unlock it?

  • mcc0925 Nov 22, 2007

    I have a Canon Powershot A610. I'm getting the "memory card error" message when I try to format my SD 8G card.I know about locking and unlocking the card and have tried to format in both positions, but I can't get rid of th error message. Any ideas????

  • Anonymous Dec 24, 2007

    my memory card is locked keep getting that messege from my camera

  • Anonymous Jan 04, 2008

    last time camera used, everything fine. just attempted to take pictures and it refuses with message "card locked". I have removed and replaced card several times...messsage remains. I tried a different card that I use also and get same message. checked menu for perhaps a message. Have check manuel for this subject...nothing. Is camera malfunctioning or has some setting been changed??

  • Anonymous Feb 02, 2008


  • Suzirice Feb 07, 2008

    Same thing.....Card locked! I've tried everything, the card lock slide, a new card, off and on, messed with all the settings! UGH! I've always loved the Canon but this problem is not ok. Please help!

  • Ktsrb Feb 22, 2008

    Camera won't work, says, "CARD LOCKED."  Can't take a picture.  Was working fine then, out of nowhere, it reads, "Card Locked," and puts me at a standstill.  I took card out, tried to "clean" it, tried to reset my menu, and nothing.  Help!

  • Anonymous Apr 21, 2008

    I have a Canon Ixus 750. I was recently given a 4GB sandisk extreme 111 card.

    The camera recognises the card but shows "MEMORY CARD ERROR". I have tried to find a resolution to this problem and also spoken to canon who cannot resolve the problem.. Is there a firmware fix or is there some other way to resolve the problem. Have tried formatting but to no avail.


  • Anonymous May 10, 2008

    I need instruction to unlock the memory card.

  • Anonymous May 16, 2008

    Try to snap a picture and Card is locked shows up.

  • buffie2008 Jun 11, 2008

    camera says that card is locked

  • rafique_187 Aug 11, 2008

    i have bought a sdhc card 8gb however when i put it into the camera the message memory card error. locked card is displayed? any solutions?

  • Anonymous Aug 22, 2008

    se encoontraba cargando la camara, pero la manipule haciendole el cambio a camara y se me apago y no me a prendido más que puedo o a donde puedo ir en venezuela

  • darandgary08 Nov 01, 2008

    I have a Canon PowerShot A720 IS that is about 6 months old. When I try to take a photo there is a message on my screen that says "card locked!". I know that there is a lock on the card so I made sure that it is in the unlocked position and I even tried another card. I noticed in my tools settings that I can not use my Format. When scrolling down the list the camera skips over the Format command. I also reset all settings on my camera to see if that would fix the issue but it did not help. Any suggestions will be appreciated. I am going a long trip and must take a camera that work. Thanks in advance.



13 Answers

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I had the same problem and it took me forever to figure it out! On my memory card there is a tiny slider that slides up and down. Mine was slid to "lock" I just slid it back and it was no longer locked! Sounds simple enough now that you know, huh?

Posted on Aug 30, 2007

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1) The locking switch on the card might have moved. If so slide it away from the square end of the card toward the end with the electrical contacts.

2) The switch inside the camera maybe stuck. If the switch in the camera is stuck (like mine was) you can tap it with a piece of plastic or blow on it. Just a piece of sand or lint in there can cause this problem. More info at

Posted on Jul 23, 2009

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I just got back from the store . Our canon said card locked and we tried the tape and another card . Solution was , get a smaller memory card . I had to down size from a 4gb to a 1gb and it went to work

Posted on Apr 14, 2008

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On my card the slider had broken off, and so was always seen as locked.

Posted on Apr 26, 2008

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I just read that solution from tdiddy!. Thankssssssssss :)

Posted on Sep 22, 2008

I just read that solution from tdiddy. Yess, yess!!! thanks tdiddy.

Santa Cruz, Bolivia

Posted on Sep 22, 2008

I had the same problem, but it wasn't just the position of the slider. In either position (on two different memory cards) the camera still read the card as locked. The solution that worked for me: A little piece of tape over the slider side of the card so that both positions were covered by tape (see link for example pic:

Posted on Aug 12, 2008

Unlock it from a button on the side of the sd memory card that says unlock

Posted on Jun 02, 2008

Usually card lock just refers the card itself. Just pull the memory card from the computer and look on the side of the card. Is there a little sliding switch> If so slide it to the other position and see what happens when you put the card back in the camera.

Posted on May 21, 2008

Hi this is to tdiddy your right i was having all the same problems and couldnt understand it however did what you said and it worked!! on mine it was a tiny grey button at the side which moved up and down. couldnt believe it was that little thing causing all the trouble.

Posted on May 07, 2008


Posted on Mar 03, 2008

So thankful that I just read that solution from tdiddy! had spent hours trying to figure that one out and was prepared to go out and buy a new one! thanks again.

Posted on Sep 14, 2007

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Thanks for the help

Posted on Apr 02, 2008

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My canon digital camera ixus 75 card is locked how to procedure to unlock

Look at your memory card. SD and SDHC cards have a slide switch along one edge. The position farthest from the metal contacts locks the card, protecting it from writes. The position nearest the contacts unlocks the card.

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The reason there is an error message on your memory card is because the memory card might have been damaged or probably not inserted properly.

To find out if the memory card is damaged, try to use the memory card in other devices that supports the memory card to see if it works. If it works on other devices, then the problem if from the card reader that is in the camera, and if it does not work, then the memory card is faulty. And the only solution is to replace the memory card.

To test the slot in the camera, try a tested okay memory card on it, if it does not work then the slot is faulty and to solve this problem, i will strongly advice you take the camera to a camera repair guy to clean the slot for you.


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OK, if the memory card itself is locked, you might sometimes get this error code. All you need to do is to take out the memory card and switch the lever on the left side to the unlock.


If the error is still displayed after you did the above, you might want to try the card in another camera.

If the card works in another camera . the problem is with your card reader in your camera.

If you open you sd slot and look inside with a sharp light , you should be able to see on the left side of the slot there is a little copper or spring steel lever switch. This switch work as follows:

1. When no card is inserted / no write protection , the switch is open and thus the protection is off.
2. When locked card is inserted , the tab is depressed and tells the camera that the card is lock.

Contrary to popular belief ,the little tab on the sd card is not an electronic switch and does not physically influence the card operation itself. If you put a locked card into a camera without a sd lock switch , you would still be able to use the card normally.

It is incredible difficult to fix this switch because of space limitations in the sd card. Look into the sd slot and if you can see the switch , use a needle to pull the little tab down toward the base of the camera by about 2mm or until it works being careful not to bend it.

If this does not resolve your problem , there might be a short in the switch circuit and the camera will need to be disassembled to resolve this error. This should cost no more than $50.

Please feel free to contact me if you need further information

Kind regards

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Memory card is full but there are no pictures on my camera.

Try using the "format" option in your camera's menu. That should wipe the card clean. There's probably a file or folder that the camera can't recognize as being one it created. You might also plug the card into a card reader and open it on a computer. The format option on the computer will also wipe the card clean to start fresh in the camera.

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Remove the memory card from the camera. Note that there is a small slide switch on one of the long edges of the card. Slide the switch to unlock or lock the card.

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It's most likely the locking switch on the edge of the memory card. Secure Digital cards have a locking mechanism on the side of the card to prevent accidental erasing of the data (that's the "secure" part of secure digital). Just slide the switch away from the locked position and try it in the camera again.

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The camera is only about 170$ brand new right now. So it is definetly gonna cost more to fix being that your overseas.
Much easier to replace it with a comparable one.

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I don't know for sure, but since it is "grayed out," it MAY be that your camera can';t utilize a card that big (in gig's that is.)

Just a guess.

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Check the switch on the side of your SD memory card. It is a small sliding switch which has a lock position. Sounds like the switch is in the "locked" position. Unlock, reload card, & you should be good to go. If not, the card is probably damaged.

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