The .7z extension indicates the archive format. Standard Windows or Mac tools sometimes struggle with this format, so you will need a third-party extractor:
It uses the LZMA algorithm, which can make files significantly smaller than ZIP without losing any data quality. RJ140155.7z
Because you are dealing with a file, you need specialized software to access its contents. Below is a guide on how to handle this specific file type and the technology behind it. 1. How to Open a .7z File RJ140155.7z