Convert 7Z.015 to 003

Understanding 7z.015 and 003 file formats

7z.015 is a part of a multi-volume archive created by the 7-Zip compression tool. When large files are split into smaller parts for easier storage or transfer, each segment is given a sequential extension such as .7z.001, .7z.002, up to .7z.015, and so on. These files are not standalone archives but segments of a single compressed archive.

003 files are also split archive parts, commonly created by file splitting tools like HJSplit or similar utilities. Like 7z.015, a .003 file is the third segment in a sequence (e.g., .001, .002, .003) and cannot be used independently.

Can you convert 7z.015 to 003?

Direct conversion between 7z.015 and 003 is not possible because both are not actual file formats but rather parts of split archives created by different tools. Instead, you need to recombine the original archive and then, if needed, split it again using a different tool to get .003 files.

How to recombine and resplit your archive

1. Recombine the 7z archive: Place all parts (.7z.001, .7z.002, ..., .7z.015) in the same folder. Use 7-Zip to extract the main file:
   Right-click .7z.001 → 7-Zip → Extract Here.
   This will reconstruct the original file.
2. Split the file into .003 parts: Use a tool like HJSplit or GSplit to split the extracted file:
   Open HJSplit → Split → Input file → Set split size → Start.
   The tool will create .001, .002, .003, etc., files.

Recommended software for the process

• 7-Zip (for recombining and extracting .7z parts): Free and open-source, available at 7-zip.org.
• HJSplit or GSplit (for splitting into .003 parts): Both are free and easy to use.

Summary

There is no direct way to convert a 7z.015 file to a 003 file. Instead, extract the full archive using 7-Zip, then split the resulting file with HJSplit or GSplit to create .003 and other parts.