.7Z.004 File

The 7z.004 file extension is associated with 7-Zip. Its one part of a multi-volume compressed 7-ZIP archive. The extension is actually only 004, the .7z is added to the file name of the archive file to distinguish it as 7z multi-volume compressed file archive.

7-ZIP is the native format of 7-Zip archiver. Like other archives, 7-ZIP files are data containers, which store one or several files in a compressed form. Compressed archives are common on internet, especially on sharing or torrent sites.

Note, that 7-ZIP executable archives cannot be made as multi volume archives. The SFX 7-ZIP archive has the common exe file extension.

In order to unpack the multi-volume 7-ZIP archive, you need to place ALL of the split parts in the same directory and start extraction of the first volume (7z.001). The program will automatically use all of the parts to extract the content of the archive.
 

How to open:

The *.7z.004 file is only one part of 7-ZIP multi-volume archive. If you want to extract this file, you must have all parts of the 7-ZIP multi-volume archive. Open the first part of 7-ZIP (*.7z.001 file) multi-volume archive in 7-Zip application and extract files from the 7-ZIP multi-volume archive.

How to convert:

It is not possible to convert only one part of 7-ZIP multi-volume archive. Only complete 7-ZIP archive can be converted in to another archive or compression format. The easiest way how to convert complete 7-ZIP multi-volume archive is to decompress the 7-ZIP archive with the use of Z-Zip and repack the content with another compression or archive application of your choice.