Files can be sent or uploaded from apps on your device. In fact, this is the only way you can send or upload non-picture files from iOS devices. 
- To send or upload files from another app:
- While in a file in another app, and tap "Open In...", "Share", or equivalent to be offered MOVEit as a choice. 
 - If you are offered MOVEit as a choice, select MOVEit.
 - Sign on (unless you are already signed on).
 - An Open file dialog asks you to choose an action:
Send as package 
Upload to home folder
 - Select one and complete.
If you choose Send as package, the file is attached to a new package, which you then complete and send.