Pr2100 program selective file deletion

Hello everyone.

I have a PR2100 within my home network. One of the applications that I have installed is a Dropbox account that I use to store videos from a surveillance camera in the cloud.

The case is that I would be interested in deleting, automatically in the Dropbox folder within the PR2100, files that are older than 15 days (or a month or the period you want to establish) so that deletion makes them disappear also from the Dropbox account to free space for new videos from said surveillance camera.

Is it possible to program this selective deletion and that only affects the files contained within a folder and its subfolders and that this process be executed automatically every day at a set time?

Thank you very much in advance for the help.