"He did not think about two contradicting parts in this script, finding files older than 30 days and running it on the 1st of every month. Since the script's objective here is to back up last month's data and month can be any of 28, 29, 30, or 31 days. So if you run this script on 1st march, it will not archive any files because all of them are less than 30 days old because February is usually 28 days long."
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