There are a number of file types and extensions in Tableau:
• Tableau Workbook (.twb)
• Tableau Packaged Workbook (.twbx)
• Tableau Datasource (.tds)
• Tableau Packaged Datasource (.tdsx)
• Tableau Data extract (.tde)
• Tableau Bookmark (.tdm)
• Tableau Map Source (.tms)
• Tableau Preferences (.tps)