I had almost 300 very important pictures on my PNY optima SD 2gb card. All but 27 are gone literally out of no where! I use a Canon Rebel camera. Is there any way to retrieve these pictures? There was no where on my screen an option to delete anything at any point! Please help me if you can!

perhaps the memory card is corrupt

Upload to your computer with your camera or have a card reader installed on your computer or get a USB card reader you can get these at any computer store or retail store. Here is a link to one Click Here

Format the card. That will remove everything on it.

If you look real close at the card, you will find a micro switch, used to protect the contents. Flip the switch and try again.

SD 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.

for safety I would take the SD card to a local Photoshop and see if they could print the Pictures for you. If they can, then they should be able to copy the data from one card to a new one. Try then to upload the pictures from the new card to your computer. If this does not work then you have a defective cad reader on your computer. You could buy an inexpensive external card reader which plugs in into your USB port.Aprox $25 at Walmart.

Look for a small switch on the side. Switch away from the locked position.

My Sanyo camera says my sd card it full when it absolutely is not. Ive even tried uploading pictures to my computer and it tells me there is an issue. It just suddenly did this one day and I think I've lost about 150 photos from Easter and other things that I can't get back and worse I can't take any pictures with my camera now.

Once the card is formatted, all is gone. A computer has a sector of the hard drive that "format" doesn't touch but portable storage devices don't have that protection.

Ur right it has a physical problem. Try to format it using dos and then give it a try.

Thankyou