Program for backing up

[Cheekykid]

I am looking for a program that will back up my files to my hard drive but will also record whats been transfered so that in the future if i want to back up many files some of which may already be there it will do everything automatically without asking if i want to replace x file etc. Basically a program that backs up only whats not already there without intervation of the user so that my back up drives are always up to date

 

[Cheekykid]

What about when i drop a folder into my backup drive? as it is now windows keeps asking if i want to replace x file with the new one. Would acronis or robocopy prevent that and simply do it all automatically?