http://www.nikonchat.com/nikon-coolpix-connector/

Is this a problem with the camera's memory card?
I have a Nikon Coolpix L11 and every time you turn on the memory card that says "this card can not be used "and not let me do anything with it. The card still has plenty of memory in it and I have been using for a little over one year. Is a 1 GB SanDisk Lexar. The card is inserted correctly and that appears to be compatible in the manual you have with the camera. I guess it will have to buy a new camera or memory card. Either that or I need to get some tips on how to clean the connectors to get it working again possibly. Thanks for any help. Lexar 1GB SD says it. I figured SD represented SanDisc but here's a photo memory card if that helps. Http: / / www.fotoesse.it/catalog/images/lexar_sd1.jpg Thanks for that site, I think may have been damaged in me to take photos when the batteries were almost out. I hope you can still recover some of the photos I took do little.
Sounds like you have damaged the memory card to any of the reasons listed here http://www.digicamhelp.com/accessories/memory-cards/corrupted-memory-card/ It's a San Disk or Lexar? If you are a San disk, what type? If a disc is risky San three cards to repair itself if you can get the camera to format. If you will not reformat the disk that San will replace it. Extreme 3 cards are guaranteed for life (his life – not the cards LOL) I only use San Disk Extreme 3 cards for just these reasons, until now I never had a mistake in 5 years. Really worth the extra. Chris