Some additional info. I remembered that I had an older SD Card in my old camera so I put it in my new Sony. When I turned on the camera the screen said "Image database could not be found" and asked if I wanted to create one. So I selected to do that. Then I was able to take photos. But when I put the old SD Card into my laptop I got the same error message that there were errors on the drive. When I selected to have my laptop fix the drive it actually did (showing the green bar moving across like something was happening) and then I was able to open the drive and view the photos.
The old SD Card is slower to read/write but seems to now be working better than the new SD Card.
