Every Monday morning I get a spreadsheet from one of my distributors that lists all items I have on pre and back order. I download that file, and then do my spreadsheet sorting. However, since I started to use the ProtonMail app on MacOS (vs in Safari) when I download the file, it gives an error that there is already a file by that name. When I save with Safari it adds a number to make it unique. I am unsure if this is a MacOS issue, or a ProtonMail app issue.
This is the way. Whatever creates the files should add the time span to the beginning of the file name.
Barring that, OP should do it