7-Zip will automatically read the subsequent files and combine them back into the original file. To help you further, could you please clarify:
while trying to extract it? Which operating system are you using (Windows 10/11)?
To restore the original file, you must have all parts (001 through 021) in the same folder.
Ensure you have the latest version of 7-Zip installed, as it is the native tool for this format.
The file extension indicates that you are dealing with a split archive created by 7-Zip . This means a single large file or folder has been divided into smaller, numbered chunks (001, 002, ... 021) to facilitate easier sharing or storage.
Like standard .7z files, split files use LZMA and LZMA2 compression, allowing for significantly smaller file sizes compared to traditional ZIP formats.
Select 7-Zip > Extract Here or Extract to "folder" .