3 ms·If you change a file extension, the file may become unusable! Are you sure?by blake8086 14y agoIf you change a file extension, the file may become unusable! Are you sure?ville 14y agoThis, 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.gzmh- 14y agommm.. foo tartar