Video_2021-.7z (2025)

if you want the absolute smallest file size for long-term storage and plan to extract the entire archive at once.

The in a .7z archive (like your video_2021-.7z ) is a compression method that treats multiple files as a single, continuous data block rather than individual items. video_2021-.7z

: Because video files (MP4, MKV) are already highly compressed, you may see limited size reduction unless there are many redundant or identical files in the archive. if you want the absolute smallest file size

: To extract just one file from a solid archive, 7-Zip may need to decompress all preceding data in that solid block, making single-file retrieval much slower than in a non-solid .zip . : To extract just one file from a

: All uncompressed files are concatenated and processed together. This allows the algorithm to find similarities across different files.