Export

Export["dest.ext",expr] exports data to a file, converting it to the format corresponding to the file extension ext. 

Export[dest,expr,"fmt"] exports data in the specified format "fmt".

Export[dest,exprs,elements] exports data by treating exprs as elements.

Export[dest,exprs,elements,options] uses the specified options.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.