I am not positive but I ran ccleaner and at least one directory is missing. It was Acad-drawings and had 200gigs of drawing files. Is there a file saved some place after a clean that would list the files cleaned? That was 25 years of drawing files. I have a backup but need to know how the most important directory on my computer disappeared.
Would you be willing to copy the file from your backup to where it was and run ccleaner again, looking in details view? (as shown in Andavari's link above)