: The .7z format uses the LZMA/LZMA2 algorithms, which typically offer significantly better compression ratios than the standard .zip format.
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 New folder.7z
: Like other archive formats, it acts as a container for one or many files and folders, reducing their overall size for easier storage or transfer. New folder.7z