I have a 1gb ultra II sandisk memory card.. And it is not being read by anything.. I put it in my reader.. and the light is on.. but nothing on my computer.. when i put it into my camera, it says memory card error.. What can i do??
Clean the contacts. If you have tried a few different readers, then perhaps this is it. It's the only thing you can do from this end. If no reader, computer, or device recognizes the card, I would contact the manufacturer.
SD cards do degrade with use (though I do not see why).
Flexing can cause degradation.
I bought a Kingston SD card once and had the same problem, so I ordered a replacement. The replacement came and that didn't work either. I dont recall why, but I tried the original card again and it worked. Then I tried the replacement card, which also began working -- and theyve both been working ever since. Weird stuff.
I suppose the moral of the story is SD cards are fickle, in my experience. Keep fiddling.