If you only have the .001 file and the archive was originally split into multiple parts, attempting to extract it will likely result in an error because the remaining information is missing.

Do you have the (like .002 or .003) for this file, or are you seeing an error message when you try to open it? How to extract part files 001 using 7zip on windows (2026)

: Right-click the .001 file and select "Extract" using a tool like 7-Zip or WinZip .

: The software will automatically detect and join the subsequent parts to reconstruct the original full-sized file.