The .z02 file extension is most commonly used by the WinZip file compression and archiving software. The Z02 files are created when the WinZip software is used to archive and compress a batch of files into a single zip archive and the resulting archive is split into different volumes. File archives are often split to make it easier to distribute the files online and to save large archives across multiple computer disks. The resulting volumes of the split file archive are all saved with their own file extension, such as .z01, .z02, .z03, etc. The .z02 file extension is normally assigned to the second volume of the split file archive. If a user wants to extract the contents of the archive, all of the volumes must be present.
The .z02 file extension is also used for Back4Win backup archive files.
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