Take out the memory stick from the camera and in the back of the stick you will see a tiny lock slide on it. Just unlock it.
Kingston is the most recomended memory card brand.
The Sony Cybershot is the premier point and shoot line from Sony's camera division. The Cybershot excels at low light photography because of the advanced CMOS sensor it has behind the lens. If you are looking to buy a Sony Cybershot, ensure that you purchase an additional SD memory card to accompany the camera. The Cybershot series has less than 50 megabytes of internal memory, meaning that it can't hold many photographs without the addition of extra memory. The Cybershot is reasonably priced and is in direct competition with point and shoots from companies like Canon and Kodak.
You just have to press it in gently, and the memory card will pop out a bit. Just enough to pull it out.
The largest Memory Stick card you can use in your Sony Cybershot DSC P71 is 256MB http://www.mymemory.co.uk/compatible-memory/Digital_Cameras/Sony/Sony_Cybershot_DSC_P71
take the memory card out of the camera and push the little yellow lock upwards to unlock it.
Mine from Future Shop Does
Place memory stick into computer card reader follow instuction on screen
To unprotect a memory card in a Kodak C160 camera, first, ensure that the write-protect switch on the memory card is not set to the locked position. Remove the card from the camera and check for a small switch on the side of the SD card; if it's locked, slide it to the unlock position. Reinsert the card into the camera and power it on to see if the protection has been removed. If issues persist, consider formatting the card through the camera's menu, but be aware that this will erase all data on the card.
how do i put my memory card in the camera, it won't fit
It depends on the camera and the size of the memory card.
Your Nikon camera may display the message "this memory card cannot be used" if the memory card is not compatible with the camera, is damaged, or needs to be formatted.
The memory card is camera specific, however the camera itself is waterproof, and that includes the SD card slot. So any card which works with the slot will work with the camera.