[ubuntu] Best backup program?

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http://ubuntuforums.org – Hi Can anyone please suggest a decent backup program to use? I need to take the following into account: 1. I have a NAS which hosts some files. I want to back these files up to a folder on my local drive. 2. I can connect (through Nautilus) to the SMB share where these files are located, but all of the backup programs I have tried seem to have problems with accessing a SMB share. 3. I want the program to be able to copy just the changed files (i.e. incremental) 4. I don't want the backup to be tarred, zipped, etc - I just want a copy of the file on the NAS in a folder on my PC. 5. As I (Hardware)