For more detailed technical guidelines, you can reference the National Archives Bulletin on File Naming Research Data Management Guides from UC Davis. of data management or more on the practical organization of creative portfolios? Best Practices for File Naming - Records Express
extension indicates a compressed container, which is an industry standard for bundling multiple related assets (like "picture sets") into a single, portable unit for easier distribution and storage. Best Practices for Your Draft Christina Model Picture Sets 424-432.rar