Frustrations with Word files attached to emails

Several times this semester I have been asked by a very concerned student if there is anyway that they can get an attached Word document back that they had modified after opening it from their email. The first thing that I ask them is if they had saved the modified Word document to their computer or a flash drive. Most answer no but go on to explain that they had opened the Word document while still in the email program and assumed that all the changes that they had made to the document would have been saved back to the email attachment. Unfortunately that does not happen so they are very surprised, disappointed and frustrated when they later open the same email and the document has none of the modifications that they had done. They become even more anxious when they discover the loss a few minutes before class as they print out the document.