WD Sync and iPhone: which is a best practice?

Yes, Vito, you are correct, and I gave you a solution in the last line of my post above, and that is to continue sending files to your OneDrive, or email them to yourself and then get them onto the My Cloud once you are at the home computer.

And, just so you do not feel alone with this issue, here is a link to a post I replied to today. This person is having the same issue as you, except he is working with Excel files and you are working with Word files. Take a look: