You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. How to Extract .7z.001 files - Microsoft Q&A
: Split archives are common for uploading large datasets to platforms with file size limits. Do you have the accompanying files (.002, etc.), or Unimportant_Rapping_Jackal.7z.001
The .001 extension indicates that this is only the of a larger split archive. To properly investigate or extract its contents, you typically need all sequential parts (e.g., .002 , .003 ) in the same folder. Technical Analysis & Extraction You can use 7-Zip on any computer, including
: If you have multiple parts, you can merge them via the command line before extraction: Unimportant_Rapping_Jackal.7z.001