I have three hard drives. The first drive is my system and boot drive. The second drive I use simply to store various files and documents that I don't want clogging up my system drive. The third drive I recently bought to hold backups of the first two drives. When I backup my system drive, I perform a partition image backup with ATI 11. My question is this: when backing up that second storage drive, am I better off doing a partition image backup like I do with my system drive, or should I simply just do a data backup of all the files on that drive since it contains no system information? Note, I regularly change or modify the contents of the drive, and wish to do regular incremental backups of it as I change its contents. Which method is faster and more efficient? Which method yields a smaller file size for the TIB file? Or is the no difference at all? Any advice, facts or opinions is appreciated.