: A .001 file cannot be opened on its own; it requires all subsequent parts of the sequence to be in the same folder to reconstruct the original data.
Do you need help to extract this file on your current operating system? How to Extract .7z.001 files - Microsoft Q&A tan.7z.001
: Right-click the .001 file. Select 7-Zip > Extract Here (or "Extract to folder"). tan.7z.001
To access the contents, you must have the 7-Zip utility or a compatible program like WinRAR installed. tan.7z.001