: It is the native format of 7-Zip , a free and open-source utility. Why is it named "New folder"?
A "New folder.7z" file is a compressed archive created using the software, containing a directory that was likely left with its default operating system name. Overview of .7z Files
: The .7z format uses the LZMA/LZMA2 algorithms, which typically offer significantly better compression ratios than the standard .zip format.
When a user creates a new directory in Windows or macOS, the system assigns a placeholder name like . If a user right-clicks this folder and selects a command like Add to "New folder.7z" , the resulting archive inherits that name. How to Manage "New folder.7z"