: Right-click the .001 file. Select 7-Zip > Extract Here (or "Extract to folder").

To access the contents, you must have the 7-Zip utility or a compatible program like WinRAR installed.

: If even one part of the sequence is missing (e.g., you have .001 and .003 but not .002 ), the extraction will fail with an error.

: It utilizes the 7z format, which is known for high compression ratios, often outperforming the standard ZIP format. How to Open and Extract It

7zip file with numbers on it like 001 means that you only have a part file of the whole compressed file. Microsoft Learn Does 7z compress better than zip? - Microsoft Community Hub

: Ensure every numbered segment (e.g., tan.7z.001 , tan.7z.002 , etc.) is present in the same directory .

: On Android or iOS, you can use specialized apps like ZArchiver or iZip to handle these multi-part archives.