Creating or handling a split archive (like First.7z.001 , First.7z.002 , etc.) requires a tool that supports multipart archives, such as 7-Zip . These numbered files represent a single, large compressed file broken into smaller parts. Here is how to and use split archives: 1. Creating a Split 7z Archive
To split a large folder or file into multiple numbered volumes (e.g., to share via email or over a network):