Here is a detailed breakdown of the features and how to handle this type of file. Key Features of 7z Split Archives

Like standard .7z files, split files use LZMA and LZMA2 compression, allowing for significantly smaller file sizes compared to traditional ZIP formats.

To restore the original file, you must have all parts (001 through 021) in the same folder.

while trying to extract it? Which operating system are you using (Windows 10/11)?

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.

Select 7-Zip > Extract Here or Extract to "folder" .