This, or even "You have used the extensions ".gz" at the end of the name. The standard extension is ".tar.gz". You can choose to use the standard extension inst

This, or even "You have used the extensions ".gz" at the end of the name. The standard extension is ".tar.gz". You can choose to use the standard extension instead." Now click "Use .tar.gz" => file now has name foo.tar.tar.gz