Mac??? Sorry, I get by on a Mac just to test Mac only printers as in "See Jane run. See Dick run" level.
Try re-saving just the defective file with a different name, to a different location, such as a USB or portable drive.
I partition all of my hard drives into C: for operating system and some programs that only want to go on C:, D: for all of my programs, and E: for all of my data into different folders and sub folders. If one part of the hard drive develops defects/virus etc, the rest of the drive might survive. FWIW,
