Attaching a file to an email message forces you to save it to Box first
Problem
If you're trying to attach a file as an attachment to an email message but are prompted to save the file to Box you can easily skip that and attach the file as you intend.
Solution
When prompted to Attach the file with Box, click No.
In the example below, we're trying to attach a csv file to an email message. We don't want to first upload it to Box and then attach it as a link. We just want a standard attachment.
Click No at the prompt and the file will be inserted as a standard attachment.