What is the best way to work back and forth with Excel?

I am trying to integrate smartsheets into our team, but some still have to use excel sheets to work with outside sources/ projects. I am trying to find a way to seamlessly have it so that my team mate can edit and excel sheet, import to smartsheet, then export from smartsheet into excel, and so on as the project progresses. Is there a way to link them automatically so that when you update one, the other automatically updates also? If not, I am currently running into the issue where every time I export an excel from smartsheet, it creates a new file instead of updating the original. Also, it reveals all of the hidden columns when import into smartsheet, and I don't want this. Any tips would be helpful!