X1.7z

It can handle archives up to 16,000,000,000 GB.

To create a fast archive using the "x1" level, the command would look like: 7z a archive.7z -mx1 source_folder . It can handle archives up to 16,000,000,000 GB

If you have a file named X1.7z or need to create one, you can interact with it using these methods: How to Use X1

Ultra compression; can use up to a 256 MB window size but requires significantly more RAM and time. How to Use X1.7z Files It can handle archives up to 16,000,000,000 GB

If a .7z file is too large for email or specific storage, 7-Zip can split it into smaller "chunks" (e.g., X1.7z.001 , X1.7z.002 ) which can then be rejoined. How to recover corrupted 7z archive

It typically achieves 30–70% better compression than the standard ZIP format.

It supports AES-256 encryption , allowing you to protect the names of files within the archive as well as their content.