Camera thinks memory card is locked

The memory card might have been damaged.If it was a problem with your camera it might not have recognized your 32k sd card.
So buy a new sd card.

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.

According to the specs on Canon's web site, the IXUS 700 works with SD cards, not SDHC cards. SD cards are limited to 2GB in size (there are rare 4GB SD cards, but they tend not to work in SD devices).

Of course, it's your call as to how definitive any manufacturer's web site touting their product might be.

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

The IXUS 50 works with SD cards. Your 4GB card is actually an SDHC card. While it fits into the slot, it is electronically incompatible and will not work. You need to use SD cards 2GB and smaller.

Yes. The IXUS 60 was designed to work with SD cards. Cards larger than 2GB are actually SDHC (the HC stands for High Capacity) and will not work in this camera.

The best way to download pictures and videos from your camera to your computer involves removing the memory card from the camera and plugging it into a card reader (either built-in to the computer or connected via USB or FireWire). This is likely to be faster than connecting the camera to the computer, and won't run down your camera's batteries.

Once the card is plugged in, it will appear to your computer as a removable drive. You can use the operating system's drag&drop facility to copy pictures and videos from the card to the computer's hard drive, the same way you copy any other files. Or you can use any photo/video cataloging program.

This is usually caused by the SD card, and is nothing to do with the camera. On the SD card there is a small slider - which allows you to lock the card (to prevent accidental erasure).

If you put in on the table with contacts upwards, corner cut top left, then the slider is on the right hand edge, about 1/3 the way down. If it is slid to the top position (nearest the contacts) the card is unlocked. If it is slid down (away from the contacts) the card is locked.

If it is a damaged / "cheap" card, sometimes the slider falls out, in which case the card is locked. You can still read from it, but not write to it until fixed or replaced.

Have you tried the camera with another SD card, to see if the problem persists?

I assume that you know that there is a tiny tiny on-off switch on the edge of each SD card. If they are locked in the off position....

I would think that as long is it is a sd memory card then it would be compatible since the camera uses the sd card and the 4gb is for photo storrage