: Use a tool like 7-Zip or WinZip to open only the first file ( Dan04.7z.001 ).
The file is the second part of a multi-volume split archive created with 7-Zip . Dan04.7z.002
If you are missing the first part ( .001 ), you will not be able to extract or view the contents of the .002 file. : Use a tool like 7-Zip or WinZip