It typically achieves 30–70% better compression than the standard ZIP format.
When using 7-Zip via the command line, the -mx switch determines the compression level. The number following "x" (ranging from 0 to 9) dictates how hard the computer works to shrink the file: No compression (Store mode). x1: Fastest compression; uses a 1 MB window size . x5: Normal compression (Default). It typically achieves 30–70% better compression than the
You can open these files using the 7-Zip File Manager or third-party tools like WinZip . x1: Fastest compression; uses a 1 MB window size
To create a fast archive using the "x1" level, the command would look like: 7z a archive.7z -mx1 source_folder . To create a fast archive using the "x1"
It supports AES-256 encryption , allowing you to protect the names of files within the archive as well as their content.
Ultra compression; can use up to a 256 MB window size but requires significantly more RAM and time. How to Use X1.7z Files