software to record cd/dvd depending on the size of a folder

[Luca Ferrari]

Hi all,
I don't know if there's a software to do this: I'd like to monitor one (or 
more) folders on a disk, and to make a backup copy on a dvd once the size of 
the folder has reached an appropriate value (~4GB), removing then the 
recorded files. Any suggestion?

Thanks,
Luca