Meta: How can I attach an Excel file to a post?

[aaltomani]

I have a question which would be easier to ask if I could attach the Excel file. If I drag and drop it onto the window an error appears saying  that .xlsx files are not supported. Can I attach the file in some other way?

[#2 · Accepted solution]

@aaltomani If you don't see this option at the bottom of your post yet

you need to share the file via Onedrive, Dropbox or some similar file sharing facility.