Ying&yang1.7z -

Could you provide more on where you found this file or what it's supposed to do ? Does 7z compress better than zip? - Microsoft Community Hub

: The architecture is open-source under the GNU LGPL, making it a secure and transparent choice for data storage. How to Produce or Extract a 7z Archive

: Right-click the Ying&Yang1.7z file and select 7-Zip > Extract Here to see its contents.

However, since the extension indicates a compressed archive created with 7-Zip , the "feature" you are likely looking for involves the specific capabilities of the 7-Zip format. Key Features of the 7z Format

: The 7z format typically provides better compression than the standard .zip format, especially when using the LZMA or LZMA2 algorithms.