Issue :- Today i found an issue of downloading file from SharePoint which is not asking save instead of open directly.
Fix: - Pass the url of file in given example.it will ask save file in your file location
https://lntanjanareddy.sharepoint.com/sites/tt/_layouts/download.aspx?SourceUrl=https://lntanjanareddy.sharepoint.com/sites/tt/SiteAssets/Test.xlsx
