In Latin, data is the plural of datum and,historically and in specialised scientific fields,it is also treated as a plural in English.In modern non-scientific use,however,it is often treated as a mass noun,similar to a word like information,which cannot normally have a plural and which takes a singular verb.Sentences such as" data was collected over a number of years" are now widely accepted in standard English,
Datas is just a made up word.