Need advice for backup software for linux

Hi,

I currently use a program called copywhiz on windows that backs up any files or directories created after a certain date to a usb hard drive and runs once a day.

I want to transition fully to Linux. Is there any easy to use software that works on Linux that can do this?

P.S. I have tried creating a bash script to do this but for some reason it has trouble with the date part. So a software solution would be prefered.