I want to sync these 2 folders

I have the following script that runs on a schedule to back up a folder from my PC to my NAS:

G’day all,
I am running a backup sequence using Robobcopy.
This sequence includes sending an email to the User telling them if the Backup was Successful or if it Failed.
It all runs well, It sends a Success email everytime it works, but if it is an extreme Fail, it sends an Extreme Failed email and also a Success Email. This is confusing for the User’s 🙂

Apologies if this is rudimentary for this site and please send me a link to any pre-existing answers to this question.

I have a folder that contains the same files. What differentiate them, is the date. I am trying to write a robocopy script that copy files based on the date. I don’t want it to copy every file in the folder. Please is there a way around it?