** .rar:** This is the file extension for a Roshal Archive. It is a compressed file format used to bundle multiple files together into a smaller size for easier sharing or storing. What is Usually Inside Such Files?

RAR files are a common vector for viruses, ransomware, and trojans. Before doing anything:

Département 13, also known as Bouches-du-Rhône, is a département in the Provence-Alpes-Côte d'Azur region of southeastern France. The postal codes for this département range from 13001 to 13016. Could the "13" in "Code postal new folder 13.rar" be a reference to this département?

If we focus on the part alone, here is what is relevant: