X1.7z

"X1.7z" typically refers to a that uses specific configuration settings or command-line parameters. In the context of 7-Zip optimization, "x1" often represents the lowest compression level (Fastest), which uses a 1 MB dictionary size to prioritize speed over file size reduction. Understanding the .7z Format

To create a fast archive using the "x1" level, the command would look like: 7z a archive.7z -mx1 source_folder .

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).