Good thought, Don.
No, I never changed anything within the file structure of the suspect card. Still, I would compare the suspect card with a working card if I could, but I have since reformatted the suspect card, which is working normally again. All that remains from the copy of the suspect card I did have are the .MTS files.
By the way, Don— or anyone— can you suggest a tool I can use to convert these .MTS files (in a lossless way) so they become importable by FCPX?
Thank you!