Microsoft has confirmed a bug in Word for Microsoft 365 that deletes files if you try to save them.

Microsoft has fixed a known issue that was causing Word to delete some Windows users' documents instead of saving them.

For me, Microsoft Word's best offering is the ability to easily customize the tabs, groups, and commands you see on the ribbon (the part above where you do your work on Microsoft Word) and their order. You can even create new tabs and groups to suit the work you do, and it's this level of detail that I particularly enjoy about the program.