My card is locked - Casio Exilim EX-Z750 Digital Camera

For the card locked, make sure that you are using a 2GB or smaller card. The E760 can not use 4GB or larger SDHC cards. 2GB cards can still be purchased on Amazon if your local store no longer carries them. If you are using 2GB, then here are some more tips for card locked.
For the "lens error", see this article for tips and steps that might help you repair it.

SOLUTION 1 - Unlock the memory card.

There is a Lock switch on the left side of the SD card. Make sure the Lock switch is slid up (unlock position). You will not be able to modify or delete the contents on the memory card if it is locked.

NOTE: If you are using a microSD/microSDHC card or a miniSD/miniSDHC card, insert the card into the standard SD adapter.


SOLUTION 2 - Toggle the lock switch.

If the lock switch is not on lock:
1. Slide the switch up and down. Repeat this 3 times.
2. Let it stay on the Lock position for 30 seconds.
3. Slide the switch up to unlock the card.
4. Try to transfer files into the device.

Hi. Remove the card. On the side of the card is a small sliding lock. That's it. J.

In case it uses the SD card, then there is a lock feature in the card. You will need to unlock the card so that it becomes read/write enabled. In lock position, it is read only, so you can read the files from it but cannot create any more files.

Most SD cards have a switch on the edge of one side of the card. Sliding it up or down will unlock or lock the card. When the card is locked, you will not be able to transfer any audio tracks. Nor will you be able to play any copy protected files. We recommend you always keep the card unlocked.
NOTE: We have found that on some cards, if the slider is even halfway towards the lock position, the card will be locked. Make sure that the slider is all the way to the UN-locked position.

In case it uses the SD card, then there is a lock feature in the card. You will need to unlock the card so that it becomes read/write enabled. In lock position, it is read only, so you can read the files from it but cannot create any more files.

Most SD cards have a switch on the edge of one side of the card. Sliding it up or down will unlock or lock the card. When the card is locked, you will not be able to transfer any audio tracks. Nor will you be able to play any copy protected files. We recommend you always keep the card unlocked.
NOTE: We have found that on some cards, if the slider is even halfway towards the lock position, the card will be locked. Make sure that the slider is all the way to the UN-locked position.

I had the same problem - just put the lock button of the card to the lock position and than again to the unlock position

Take the card out. On the left side of the card is a tiny white switch. Reverse the position.

try puting the lock thing onto Lock. it worked for me

I noticed that this camera does not work well with cheaper memory cards. The only brand that works without fail is the SanDisk brand.