To attach and send files in multiple formats, including pictures, documents, PDFs, audio and video files from Dropbox, Google Drive, OneDrive or any cloud storage service, simply follow these steps:
1. Tap the Paper Clip icon in the Nav Bar.
2. Tap Attach File.
3. A location menu will open to allow you to find and select the image or file.
4. Locate the source of your file and tap it to select it.
5. Tap the Image(s) or document(s) you wish to attach.
Note: Attachment thumbnails will appear at the bottom of your Compose screen. The total size limit for all uploaded attachments is 25MB.