Do you have the file in the same directory as this one? WinZip Opens & Extracts 7Z Compressed Archive Files

You cannot open this file by itself; you need the entire set to extract the data.

Use a tool like 7-Zip or WinZip to open or extract the file ending in .001 .

Large archives are often split into smaller segments (volumes) to make them easier to transfer or store on drives with file size limits. How to open it