New
#31
In support of the possibility that backups could be messed with by defragging, there were 3rd party programs that could move clusters/sectors that the OS had marked as unmovable and that the built-in defrag couldn't move. Using those programs gave a graphical display of those files, in red, and truly would allow a tighter arrangement of the files on the drive but also could skew the MFT/Master File Table which could cause issues, anywhere from minor to catastrophic.