RJNaylor wrote:
It sounds like you have stored your files on your C drive ... If you could export them, that is. Is this so?
Then you you may need a new external drive. If so, you might consider getting a second external and synchronizing software to mirror them. This is actually pretty easy.
I did use my external drive as a storage drive. I had to move them to another drive I use for my Time Machine. Then I formatted my external drive. Moved the photos back over and now it is working perfectly. The drive was manufactured in 2006. I think it is time to look for another drive.