My camera is telling me that there is a memory card error on all my cards. I have reformatted one and it makes no difference.

Usually that indicates either a bad card or a card that needs to be reformatted. Use a card reader to reformat the card in your computer and then try it in the camera. If it recognizes the card in the camera then use the camera to format the card again to its requirements. If that fails, try a different memory card.

http://www.usa.canon.com/cusa/support/consumer/digital_cameras/powershot_a_series/powershot_a70#ServiceAndSupport

Issue: Memory card Error
Solution: Try a different memory card and/or Reformat memory card PowerShot A70


Formatting a CF Card You should always format a new CF card or one from which you wish to erase all images and other data.
Please note that formatting a CF card erases all data, including protected images and other file types. Please check the contents of the CF card before formatting it.

1. Turn the power on.
   
   
2. Press the <MENU> button and select [ (Set up)] using or .
   
   
   
   
3. Select (Format) using or and press the <SET> button.
   
   
   
   
4. Select [OK] using or and press the <SET> button.
   
   
   
   
   • To cancel formatting instead, select [Cancel] and press the <SET> button.
   • The capacity of the CF card displayed after formatting will be less than the rated capacity of the CF card. This is not a malfunction of the CF card or camera.
   
   
   
5. Press the <MENU> button.

• If the camera does not work properly, the inserted CF card may be malfunctioning. Reformatting the CF card may solve the problem.
• When a non-Canon brand CF card is malfunctioning, reformatting it may solve the problem.
• CF cards formatted in another camera, computer or peripheral device may not operate correctly. When that happens, reformat the CF card with this camera.

Having gone over a month with no response, I assume it was just a matter of SD versus SDHC cards.

try to reformat the card either from camera or pc. If reformating doesn't work, then try a different card. Some camera's are touchy when it comes to the memory cards

the memory card may need to be reformatted. if you have an external card reader, plug it in, right click (in windows) and select format.

you might be able to format it through the camera if you don't have a memory card. connect the camera to the computer, and treat it like an external card reader.

if reformatting doesn't work, sounds like the card went bad.

Its possible the card is corrupt. You can try reformatting it on another device like a card reader on your computer. Also try a a different/new memory card.
Thank you,
Lee

you may have a problem with the memory card. it may be corrupt and sometimes when they are corrupt there is no way to fix them. lets try somethings first. how often do you reformat your card? i would suggest everytime you are clearing all of your pictures off. the more times you use it the more often you should reformat. always make sure you back up photos you want so you dont delete them. also if you could use your Sony card in a computer.. whether you have one at home that has a memory card slot or you can also run up to a local walmart/target.. whatever place that has a digital photo center.. and see if it registesrs that you have a memory card. a pc is best because you'll be able to tell if it can register your mem card. if it does try to reformat it in your sony camera. if this gives you an error again i would suggest seeing if you could reformat it in your computer. once you do that stick it back in your camera and reformat it to your sony camera. one more thing. if you have another sony camera lying around or have a friend that can use the same card i would try it in their camera first just to see it it will do the same thing. this should fix the problem if not then i would suggest purchasing another card. doing this will show you that its most likely your card on its last breath.. sorry but i can assure you its not the camera!

Try a different SD card to start.

A card access error may indicate that an xD-Picture Card memory card is in a write-protected condition. xD-Picture Card memory cards have a special protection feature to ensure that your pictures are kept safe. NOTE: During this condition, you can still use the printer for printing and saving photos from the xD-Picture Card to a secure location, such as the computer hard drive. To resolve this error, try the following:

• Reinsert the xD-Picture Card memory card into your camera and turn on the camera. In most cases, the camera automatically makes the necessary changes.
• Reformat the xD-Picture Card memory card. See the documentation that came with your camera for instructions on reformatting the memory card. Note that this process erases the pictures currently saved to your memory card. To save these pictures, transfer them to the computer before reformatting the memory card. Once you reformat the memory card, transfer those photos back to the memory card using the computer.

Most likely one of the pins on the compact flash connector is bent, not allowing the card to be recongnized correctly - Am now fixing such a problem for a friend