I just had a near heart attack when a CF card from yesterday's shoot didn't want to read in my PC. Although it was my backup camera (for that card anyway), my other two CF cards worked fine, one even from the same camera body.
Here's what is puzzling me:
I have 3 cards, a Sandisk Extreme III 16GB, 8 GB and a 4GB. The 16GB has been in my 40D and is and always has been reading fine from my CF card reader. The 8GB has been in my 5D and did the job without problems. Before this, I always used it in my 40D. Both the 16GB and the 8GB have been formatted on friday before the shoot (quick format in windows 7).
The 4GB card (yes, kick me, I know...) was in the 5D I just bought before the shoot. It was empty when I bought the camera. My test shots were still on it.
I just popped the 16GB and 8GB cards in my camera, and they downloaded perfectly. The 4GB card didn't want to be read, and windows asked me to format it (omgikillyou!).
Fortunately, the images are now downloading from the 5D via USB (sloooowly), so nothing appears to be lost, but my heartbeat is still going crazy.
Can anyone shed some light on this? Could it be a mac formatted card or something that the 5D has no trouble with, but won't read into my pc? Should I just throw it out or only use as an absolute last resort?