auto backup always backs up ENTIRE c:/ drive -- not just changed files

[freudberg]

After doing the "initital backup" of my entire C:/ drive (which took 9 hours), I (tried to) set up Retro 6.5 to do a daily auto backup. From what the software displays, Retro should just backup the files that have changed, yet every night the software backs up everything. I am pretty sure all my settings are correct. Please advise. Thank you.

-Frank