X1.7z

You can open these files using the 7-Zip File Manager or third-party tools like WinZip .

To create a fast archive using the "x1" level, the command would look like: 7z a archive.7z -mx1 source_folder . You can open these files using the 7-Zip

Ultra compression; can use up to a 256 MB window size but requires significantly more RAM and time. How to Use X1.7z Files You can open these files using the 7-Zip

The format is an open-source, highly efficient compressed archive container. It was originally introduced as the native format of the 7-Zip software and is known for several key features: You can open these files using the 7-Zip