What do you mean “but how do we copy the data without affecting the original design and template ?”
Would you like to write the data on a different excel file? If so, just modify the absolute file path from the Write Range activity
Concerning “using the write range some of the data is not copied and some templates also like font types and stuffs.” , could you please share some print screens from your workflow & data file.
The you should replace the Read Range & Write Range from the provided example with the Duplicate Sheet activity ( https://docs.uipath.com/studiox/v2019/docs/duplicate-sheet-x ) from Studio X
Keep the Write Cell activity in order to add the cell with the current date