I have a huge problem!
I had yesterday a photoshoot, today I was importing my images from my CF card to my local drive C: with Lightroon 4... Everything was fine, till a moment I get an error of Windows: "you need to format the disk in drive before you can use it."
I rejected my card, insterted in my dslr to check if picture still available, but on my screen I see the same error message 'Format first the card to use it'
I don't know how to solve this problem ! the 50% of my images are not imported and I need them. How can I solve this problem ? !
Looks like a corrupted/damaged CF card (not a Lr issue) - but can you copy the files direct from the card to a hard drive using Windows Explorer?
If you can, you can then get to them via Lr: but if not, you might be in trouble.
Whatever you do do NOT format the card or try to shoot pictures with the card in the camera.
See this link for recovery software recommendations: