How to convert .004 files to .zip files.
The split archive's fourth file is designated as a .004 file by different file splitting and joining tools. It is utilized to divide large archives into smaller, easier-to-manage files.
Decompressing each component before creating a new archive is the simplest way to create a single large .zip file from a split multi-volume archive.
To properly decompress all data, all components (.001, .002, .003, ...) are required.