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 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
: This indicates the 7z format , a modern archive format known for high compression ratios and strong AES-256 encryption. : The software will automatically detect the other