How to attach a file in Blackberry email1. When you are composing an email message, press the Menu key. 2. Click Attach File.3. To attach a file saved on your BlackBerry device memory or media card, navigate to the file. Click the file.4. To attach a file saved on your organisation's network, press the Menu key. Click Go To. Navigate to the file. Click the file. If necessary, type the credentials you use to connect to your organisation's network....