[ANewBeat]

I would like to find a backup/copy program in which I can specify which file to copy by the date modified. Currently all of the files in question are located on a networked external drive. I would like to copy files that have been modified in the past six months to a new external hardrive. After that, I would like to automate a backup, maybe once a week, of the latest modified files from the new drive back to the original drive. Note that these files are located within folders, and sometimes sub-folders within these folders. Any help? Thanks.