Demystifying Split Archives: A Guide to Opening .7z.001 Files
The .001 indicates it is the very first part of the sequence. 1 (7)-7 & 1 (8)-8.7z.001
If you try to open a standalone .001 file and see an "Unexpected end of data" error, it almost always means . The software expects to find Part 2 to continue the extraction, and when it can't find it, it assumes the file is corrupted. How to Open and Extract Your Files Demystifying Split Archives: A Guide to Opening
Here is everything you need to know about what these files are and how to actually use them. What Exactly is a .7z.001 File? A file ending in .7z.001 is a . How to Open and Extract Your Files Here
The Unarchiver or WinZip are reliable alternatives. For Mobile: Use apps like iZip or ZArchiver . 2. The Extraction Process How to Extract .7z.001 files - Microsoft Q&A