: This is the primary filename chosen by the user who created the archive.
: This is the sequence number. It signifies that this file is the 4th volume in a series of split files. How to Open the File ZZZZ-020.7z.004
: The software will automatically detect the other parts, including your .004 file, to rebuild and extract the original data. Why Files are Split Users typically split 7z archives for several reasons: How to open 004 file (and what it is) - File.org : This is the primary filename chosen by
: Ensure you have all sequential files in the same folder (e.g., ...001 , ...002 , ...003 , and ...004 ). including your .004 file