You are saving to a flash drive. Doing this is destroying your document!
Word does not work with flash drives. You need to act as if you do not have any flash drives while you are using Word. You can use Windows to copy any document on a flash drive to your hard drive, use Word with it, and when Word is closed, copy it back if you wish.
This means:
- Do not open a document on a flash drive from Word or with Word.
- Do not save a document to a flash drive from within Word.
- Do not print a Word document while it is on a flash drive.
Working within Word on documents that are on removable media will cause
document corruption.