: Ensure the files are named exactly the same (e.g., Sunny.7z.001 , Sunny.7z.002 ). If one has an extra character or a different name, the software won't recognize they belong together.

: This usually means Part 1 ( .001 ) is missing from the folder or the download was interrupted and the file is corrupted.

: Hover over 7-Zip > select Extract to "Sunny/" .

: Move Sunny.7z.001 , Sunny.7z.002 , and any other numbered parts into a single folder.

: If you only have .002 , you must go back to the source and download .001 . The extraction process must start with the first volume.