Convert 7Z.001 to 7Z.002

Understanding 7z.001 and 7z.002 file formats

7z.001 and 7z.002 are not standalone file formats, but rather parts of a split archive created by the 7-Zip compression tool. When a large file or folder is compressed and split into multiple volumes, the resulting files are named sequentially as 7z.001, 7z.002, 7z.003, and so on. Each part contains a segment of the original archive, and they must be combined to extract the full content.

Purpose of splitting 7z archives

Splitting archives into multiple parts is useful for transferring large files over media with size limits, such as email attachments or certain file hosting services. The 7z.001 file is always the first part, and extraction must begin with this file. The 7z.002 file is the second segment and cannot be used independently.

How to combine and extract 7z.001 and 7z.002 files

To access the contents of a split 7z archive, you do not convert 7z.001 to 7z.002 or vice versa. Instead, you must have all parts of the archive in the same folder. Extraction is performed on the 7z.001 file, and the software will automatically use the subsequent parts (7z.002, 7z.003, etc.) as needed.

Best software for extracting split 7z archives

• 7-Zip (Windows, free): Right-click the 7z.001 file and select 7-Zip → Extract Here or 7-Zip → Extract to "folder".
• PeaZip (Windows/Linux, free): Right-click the 7z.001 file and choose Extract.
• The Unarchiver (macOS, free): Open the 7z.001 file with The Unarchiver; it will process all parts automatically.

Important notes

• All parts (7z.001, 7z.002, etc.) must be present in the same directory for successful extraction.
• Do not attempt to manually convert 7z.001 to 7z.002; these are sequential parts, not formats to be converted.
• If any part is missing or corrupted, extraction will fail.

Summary

To access files from a split 7z archive, use extraction software like 7-Zip on the 7z.001 file. The process will automatically use 7z.002 and any additional parts. No conversion between 7z.001 and 7z.002 is necessary or possible.