Setting an Automated Task in WordPress

I have a website where people can upload files and I used the WP Filebase plugin for this. I have it synced to Dropbox (that is a feature of the plugin) and I can manually sync the two, but I there is no option to set it to automatically sync (say for instance, ever couple of hours). Would this be a very hard thing to do, or is there some way of doing this?

Thanks!

Tim